KR20180016125A - Light sensor module - Google Patents

Abstract

The present invention relates to a light sensor module and, more specifically, relates to a light sensor module which is configured to more effectively absorb light incident in a specific direction. According to the present invention, light incident in an undesired direction is blocked to reduce interference caused by unnecessary light for only light having high reliability to be detected as an electric signal in a light receiving unit of the light sensor module. Moreover, in accordance with an appropriate arrangement position of the light receiving unit, light receiving efficiency of each light receiving unit is improved to minimize a loss of light arriving at the whole light receiving units. Therefore, an electric signal having high reliability can be detected.

Description

Optical sensor module {LIGHT SENSOR MODULE}

The present invention relates to an optical sensor module, and more particularly, to an optical sensor module configured to more efficiently absorb light incident in a specific direction.

Optical sensors are devices that convert light into electrical signals. It is mainly used for devices that detect intensity and color of optical images and convert them into digital image data. Especially, it can be applied as an electronic component for storage and transmission of video and image, and for recycling. Specifically, it is used as a core component of a cellular phone camera and a digital camera. The optical sensor module is also used for image and image signal processing, which is also called an image sensor.

Recently, optical sensors are used not only as core components of the above-mentioned cameras but also in various fields such as bio-photoreactivity measurement devices, lens-free microscopes, in vitro diagnostic devices using optical reaction measurement of immunochromatography, and bio- Is expanding its use. However, in the above-mentioned biotechnology field, it is appropriate to name the optical sensor because it plays a role of processing and analyzing signals of each pixel by measuring bio-photoreaction rather than acting as a sensor for acquiring image and image signals.

2. Description of the Related Art Image sensors used in the field of image and image processing are roughly divided into CCD (charge coupled device) and CMOS (complementary metal oxide semiconductor) image sensors. Among them, CMOS image sensor is a sensor using CMOS (Complementary Metal Oxide Semiconductor) technology, which has a high processing speed, low power consumption, low production cost, and can incorporate a logic circuit in the same manufacturing process, And is easy to integrate.

Conventionally, a CMOS image sensor module includes an external optical lens, a filter, and a CMOS image sensor including a micro lens and a light receiving part.

The external optical lens and the micro lens of the CMOS image sensor condense the light of the external light source, and the condensed light enters the light receiving unit. The incident light is converted into an electrical signal at the light receiving portion and is detected at the light receiving portion or through an electronic circuit formed separately.

However, in the above case, there is a difference between the amount of light incident on the light-receiving unit located at the center of the image sensor and the amount of light incident on the light-receiving unit located at both ends of the image sensor due to the light condensed by the external optical lens.

In order to solve the above problems, a microlens and a light receiving unit are conventionally disposed on a light path through which light condensed by an external optical lens is incident. When the microlens or the light receiving unit is disposed on the light path of the condensed light, the microlens and the light receiving unit have to be arranged at a boiling interval in the horizontal direction.

However, in the optical sensor module used in the field of bio photoreactivity measurement and in the field of in vitro diagnostics, the biooptic reaction occurs close to the optical sensor module (i.e., the light source is very close to the optical sensor module) . Therefore, the external optical lens can be removed in the optical sensor module for bio-photoreaction measurement.

However, due to the absence of the external optical lens, there may be a difference in the amount of light absorbed by the light receiving portion at the center of the optical sensor and the light receiving portion at both ends of the optical sensor, depending on the angle at which the light of the external light source enters the light receiving portion. There was nothing. In addition, there is also a problem that the photoreaction characteristics of the respective light receiving portions of the optical sensor module are varied by external light that is not needed in addition to a specific bioptic reaction.

As a result, in the conventional optical sensor module used in the field of bio-photoreactivity measurement and in vitro diagnostics, there is a problem that the error of the electrical signal detection occurs due to the difference in the optical reaction characteristics of the light receiving unit, .

Korean Patent Laid-Open No. 10-2004-0060509 (Published Date 2004. 07. 06)

In order to overcome the above-described problems, it is an object of the present invention to provide an optical sensor module having a light selection unit for passing only light incident at a specific angle to block unwanted light from being absorbed into a light receiving unit.

Another object of the present invention is to provide an optical sensor module capable of reducing a difference in amount of light incident on the center and both ends of the optical sensor module by appropriately arranging the light receiving portions of the optical sensor module.

According to an aspect of the present invention, there is provided an optical sensor module including: a lens array in which light is incident; And a light receiving portion array for absorbing light passing through the lens array, wherein the light receiving portion array includes at least one light receiving portion set including a plurality of light receiving portions, and the light receiving portions belonging to the light receiving portion set are arranged at equal intervals from the adjacent light receiving portions It is preferable that they are spaced apart from each other.

And a light selection unit for passing light incident in the first direction and blocking light incident in the second direction, wherein light incident on the lens array passes through the light selection unit and is incident on the lens array do.

It is preferable that the convex lens is not disposed in the optical path of the light incident on the lens array.

And the light selection unit is characterized in that a transmission spectrum of the light is different according to an incident angle of light incident on the light selection unit. Also, the light selecting unit may include a light shielding structure for blocking transmission of light incident in the second direction, and a light absorbing material for absorbing light may be applied to the light shielding structure, or a reflector for reflecting light may be formed . The light selection unit blocks light incident perpendicularly to the light selection unit.

Wherein the light receiving unit is disposed horizontally spaced apart from the vertical bottom of the lens by d of Equation 1, where H is the distance between the lens array and the light receiving unit array at d = H tan θ, , And [theta] is an incident angle of light incident on the lens array in the first direction.

According to an aspect of the present invention, there is provided an optical sensor module including: a lens array in which light is incident; And a light receiving portion array for absorbing light passing through the lens array, wherein the light receiving portion array includes at least one light receiving portion set including a plurality of light receiving portions, and the light receiving portions belonging to the light receiving portion set are arranged at equal intervals from the adjacent light receiving portions It is preferable that they are spaced apart from each other.

And a light selection unit for passing light incident in the first direction and blocking light incident in the second direction, wherein light incident on the lens array passes through the light selection unit and is incident on the lens array do.

It is preferable that the convex lens is not disposed in the optical path of the light incident on the lens array.

And the light selection unit is characterized in that a transmission spectrum of the light is different according to an incident angle of light incident on the light selection unit. Also, the light selecting unit may include a light shielding structure for blocking transmission of light incident in the second direction, and a light absorbing material for absorbing light may be applied to the light shielding structure, or a reflector for reflecting light may be formed . The light selection unit blocks light incident perpendicularly to the light selection unit.

Wherein the light receiving unit is disposed horizontally spaced apart from the vertical bottom of the lens by d of Equation 1, where H is the distance between the lens array and the light receiving unit array at d = H tan θ, , And [theta] is an incident angle of light incident on the lens array in the first direction.

1 is a view showing a conventional CMOS image sensor module having a convex lens formed thereon.
2 is a view showing an image sensor in which a convex lens is not formed according to an embodiment of the present invention.
3 is a view illustrating an optical sensor module according to another embodiment of the present invention.
FIG. 4 is a diagram illustrating the transmittance of light according to an incident angle in the optical selection unit according to an embodiment of the present invention. FIG.
5 is a diagram illustrating a light selection unit according to another embodiment of the present invention.
6 is a view showing an optical sensor module according to another embodiment of the present invention.
7 is a view illustrating an incident angle checker having a pattern in an optical sensor module according to another embodiment of the present invention.

The following merely illustrates the principles of the invention. Thus, although not explicitly described or shown herein, one of ordinary skill in the art can invent various devices that implement the principles of the invention and are included in the concept and scope of the invention. It is also to be understood that all conditional terms and examples recited in this specification are, in principle, explicitly intended only for the purpose of enabling the inventive concept to be understood, and not to be construed as limited to such specifically recited embodiments and conditions .

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: .

In the following description, a detailed description of known technologies related to the present invention will be omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

1 is a view showing a conventional CMOS image sensor module 100 having a convex lens formed thereon.

1, the conventional CMOS image sensor module 100 may include an external optical lens unit 11, an IR filter unit 12, an image sensor 13, and a substrate 14. As shown in FIG.

The external optical lens unit 11 is disposed at the top of the CMOS image sensor module 100 and exposed to the outside of the CMOS image sensor module 100.

Since the external optical lens unit 11 is a convex lens, when light is incident from a light source outside the CMOS image sensor module 100, the light is condensed.

The IR filter unit 12 is disposed below the external optical lens unit 11 and blocks infrared rays contained in light passing through the external optical lens unit 11. [

The image sensor 13 is disposed under the IR filter unit 12 and receives light passing through the IR filter unit 12 and converts the light into an electric signal.

An image sensor 13 is mounted on the upper side of the substrate 14. The substrate 14 is electrically connected to the image sensor 13. The substrate 14 is provided with an electronic circuit and is designed to detect the electrical signal as needed.

Specifically, as shown in FIG. 1B, the image sensor 13 may include a microlens array 15, a color filter array 16, and a light receiving portion array 17.

The microlens array 15 includes a plurality of microlenses 15a, 15b, 15c, 15d, and 15e disposed at the top of the image sensor 13 and collecting light passing through the IR filter unit 12 .

The color filter array 16 includes a plurality of color filters 16a, 16b, 16c, 16d, and 16e that partially pass incident light so as to detect only one color of red, green, and blue in a light receiving portion array 17 ).

The light receiving section array 17 includes a plurality of light receiving sections 17a, 17b, 17c, 17d and 17e for absorbing light passing through the color filters 16a, 16b, 16c, 16d and 16e.

The CMOS image sensor module 100 includes an external optical lens unit 11 as described above as well as a microlens array 15.

The light coming into the CMOS image sensor module 100 passes through the external optical lens unit 11 and the microlens array 15 and is incident on the light receiving unit array 17.

The light coming from the outside can be primarily refracted through the external optical lens unit 11 and can be refracted through the microlens array 15 in a secondary direction. The light rays passing through the microlens array 15 are concentrated at the central portion of the light receiving portion array 17 so that the lenses 15a, 15b, and 15c of the microlens array 15, The light receiving portions 17a, 17b, 17c, 17d, and 17e of the light receiving portion array 17 or the light receiving portion array 15c, 15d, and 15e must be properly arranged.

1B, when the lenses 15a, 15b, 15c, 15d, and 15e of the microlens array 15 are arranged at equal intervals, the distance from the center of the image sensor 13 to both ends of the light- 17b, 17c, 17d, 17e are arranged efficiently by arranging the light receiving portions 17a, 17b, 17c, 17d, 17e so that the intervals between the light receiving portions 17a, 17b, 17c, 17d, As shown in FIG.

As shown in FIG. 1C, when the light receiving portions 17a, 17b, 17c, 17d and 17e of the light receiving portion array 17 are arranged at equal intervals, the distance from the center of the image sensor 13 to both ends of the microlens array 15a, 15b, 15c, 15d, 15e are arranged so that the distance between the lenses 15a, 15b, 15c, 15d, 15e of the light- 17b, 17c, 17d, 17e can be efficiently received.

2 is a view showing an image sensor 200 in which a convex lens is not formed according to an embodiment of the present invention.

As shown in FIG. 2, the image sensor 200 represents an image sensor 200 provided in an image sensor module (not shown) in which a convex lens is not formed.

1, the convex lens primarily refracts light to be condensed before the light coming from the outside of the image sensor module (not shown) enters the lens array 31, which will be described later However, when the convex lens is mounted on the image sensor module, the volume of the entire image sensor module becomes large.

The CMOS image sensor 200 in which the light receiving portions 23a, 23b, 23c, and 23d of the light receiving portion array 23 are arranged at equal intervals can be proposed instead of the convex lens.

The image sensor 200 includes a lens array 21, a color filter array 22, and a light receiving portion array 23.

The lens array 21 and the color filter array 22 are the same as those of the conventional microlens array 15 and the color filter array 16 shown in FIG. 1, respectively, in the specific configuration and effects. do.

Hereinafter, the light-receiving portion array 23 according to an embodiment of the present invention will be described in detail.

Since the image sensor module (not shown) does not include a convex lens which is exposed to the outside as described above, light coming from the outside is incident on the lens array 21 in parallel. Therefore, the light incident on the lens array 21 is condensed by only one refraction and is incident on the light-receiving portion array 23.

Therefore, in the image sensor module (not shown), the arrangement of the light receiving portion of the light receiving portion array 23 must be different from that of the light receiving portion array 17 of the CMOS image sensor module 100 of FIG.

As described above, the light entering the image sensor module (not shown) is refracted only once in the lens array 21. Therefore, compared with the CMOS image sensor module 100 of FIG. 1, the light passing through the lens array 21 is not concentrated at the center of the light-receiving portion array 23.

Therefore, in order to increase the light-receiving efficiency of the light-receiving portion array 23, the light-receiving portions 23a, 23b, 23c, and 23d of the light-receiving portion array 23 must be spaced apart from the light-

That is, the light-receiving portion array 23 includes at least one light-receiving portion set (not shown) including a plurality of light-receiving portions 23a, 23b, 23c and 23d, and the light- 23b, 23c, and 23d may be spaced apart from adjacent light receiving portions at equal intervals.

The light receiving portions 23a, 23b, 23c, and 23d can effectively absorb light from the respective lenses 21a, 22b, 22c, and 22d of the lens array 21.

As described above, according to the configuration of the image sensor 200 of FIG. 2, the convex lens is removed to reduce the volume of the entire image sensor module and increase the light-receiving efficiency of the light-receiving portion.

However, there is still a limit to detecting light-to-electricity conversion signals with a high level of reliability that can still be used in the field of biometrics.

In order to overcome the above-described problems, an optical sensor module according to another embodiment of the present invention may be proposed. Hereinafter, an optical sensor module 300 according to another embodiment of the present invention will be described with reference to FIGS.

3 is a view showing an optical sensor module 300 according to another embodiment of the present invention.

3, the optical sensor module 300 may include a light selection unit 31, a lens array 32, and a light receiving unit array 33. The optical sensor module 300 may not include a convex lens on an optical path through which light is incident.

As described above, the convex lens primarily functions to condense the light coming from the outside of the optical sensor module. However, when the convex lens is mounted, the entire image sensor module becomes bulky.

Accordingly, the optical sensor module 300 according to the present invention may not include a convex lens.

The optical selection unit 31 according to the embodiment of the present invention is disposed on the lens array 32 to be described later and allows only light incident in a specific direction to pass through the optical sensor module 300 as a reference.

In one embodiment, the optical selection unit 31 may be implemented with a filter.

The filter can be implemented in the form of a multi-layer film film structure on a transparent substrate. Therefore, it is possible to have a property that the transmittance varies depending on the incidence angle of the light, assuming that light of a specific wavelength range is incident.

In addition, the filter may be a metal filter formed of an array pattern formed of a negative dielectric material such as a nano-structured metal or an array pattern of an embossing pattern.

Hereinafter, the characteristics of the filter will be described in more detail with reference to FIG.

FIG. 4A is a graph showing transmittance of light according to an incident angle in a light selection unit (filter) according to an embodiment of the present invention. FIG.

As shown in FIG. 4A, in the light having a wavelength of 610 nm, at least 90% of light passes through the filter until the angle of incidence reaches 40 ° from 0 °. When the angle of incidence exceeds 40 °, When the angle of incidence is about 45 degrees, only 80% of the light passes through the filter.

For light with a wavelength of 650 nm, more than 90% of light passes through the filter until the angle of incidence reaches 20 ° from 0 °, but only about 65% of light passes through the filter at 30 °. When the incident angle is more than 40 degrees, the transmitted light approaches 0%.

FIG. 4B is a diagram showing transmission spectra of light at 0 degrees of incidence and 30 degrees in a light selection unit (filter) according to an embodiment of the present invention.

As shown in FIG. 4B, when light having a wavelength of 610 nm and light having a wavelength of 670 nm are incident on the filter, when the incidence angles of both lights are all 0 degrees, the two lights have a transmittance of 90% or more.

However, when the incident angle of light having a wavelength of 610 nm is 0 degree and the incident angle of light having a wavelength of 670 nm is 30 degrees, the transmittance of light having a wavelength of 610 nm is 90% or more, but the transmittance of light having a wavelength of 670 nm is 10% .

Therefore, through the above-described characteristics, the filter can pass only light incident in a specific direction. The remaining unwanted unwanted light is filtered by the filter.

Meanwhile, the optical selection unit 31 may be implemented in various configurations other than the filter in order to prevent transmission of light incident in a predetermined direction. 5 is a diagram illustrating a light selection unit 31 according to another embodiment of the present invention.

As shown in FIGS. 5A to 5C, the first direction is an incident direction of light desired to be passed by the user, and the second direction is an incident direction of light that the user desires to block. Accordingly, the light selecting unit 31 may include the light transmitting unit 41 and the light intercepting unit 42 in order to pass the light incident in the first direction and block the light incident in the second direction.

As shown in FIG. 5A, the light transmitting portion 41 may be a hole for passing light in the other direction except light incident in the second direction. The light shielding part 42 may be a light shielding film shielding light incident in the second direction physically.

5b, the light transmitting portion 41 may be a structure such as glass having a transparent material through which light can be transmitted in a straight line. The light intercepting portion 42 may be a light absorbing material applied to a predetermined portion of the light transmitting portion 41 through which the light in the second direction is incident to block the light incident in the second direction.

5C, the light transmitting portion 41 may be a hole passing through the light blocking portion 42, and the light blocking portion 42 may include a reflector such as a mirror for reflecting light in the second direction .

Meanwhile, the lens array 32 according to the embodiment of the present invention includes at least one lens 32a, 32b, 32c, and 32d.

The lenses 32a, 32b, 32c and 32d condense the light passing through the optical selection part 31 and transmit the condensed light to the light receiving parts 33a, 33b, 33c and 33d of the light receiving part array 33. [

In one embodiment, the lenses 32a, 32b, 32c, and 32d are disposed below the light selection unit 31. [

If the lenses 32a, 32b, 32c, and 32d are not provided, the light that has passed through the light selection unit 31 will be directly incident on the light receiving unit array 33 side. The light receiving portions 33a, 33b, 33c, and 33d of the light receiving portion array 33 can not properly receive all the light that has passed through the light selecting portion 31. [

The lenses 32a, 32b, 32c and 32d are arranged in the horizontal direction so as to allow all of the light passing through the optical selection part 31 to reach the light receiving part array 33. The lenses 32a, 32b, 32c, 32d so as not to generate a gap therebetween.

The light receiving portion array 33 is disposed below the lens array 32 and includes at least one light receiving portion 33a, 33b, 33c, 33d including a plurality of light receiving portions 33a, 33b, 33c, 33d for absorbing light passing through the lens array 32. [ (Not shown).

The light receiving portions 33a, 33b, 33c and 33d belonging to the set of light receiving portions correspond to the lenses 32a, 32b, 32c and 32d of the lens array 32, respectively, and the lenses 32a, 32b and 32c And 32d, respectively.

The light receiving portions 33a, 33b, 33c, and 33d may be spaced apart from the adjacent light receiving portions.

Accordingly, light having passed through each of the lenses 32a, 32b, 32c, and 32d is incident on each of the light receiving portions 33a, 33b, 33c, and 33d.

However, when the light incident on the lenses 32a, 32b, 32c, and 32d is not incident vertically with respect to the lens surface (i.e., when the incident angle of light is not 0 degrees), the light receiving portions 33a, 33b, 33c and 33d may not be arranged at the vertical lower end positions of the respective lenses 32a, 32b, 32c and 32d in order to effectively receive the light passing through the light selecting unit 31. [

Specifically, each of the light receiving portions 33a, 33b, 33c, and 33d is formed from the corresponding lens 32a, 32b, 32c, Direction by the distance d in the following equation (1). That is, the light receiving portions 33a, 33b, 33c, and 33d are placed on the optical path of the light that has passed through the lenses 32a, 32b, 32c, and 32d.

The arrangement of the light receiving portions 33a, 33b, 33c and 33d prevents the light passing through the lenses 32a, 32b, 32c and 32d from being separated from the light receiving portions 33a, 33b, 33c and 33d The light receiving efficiency of the light receiving portions 33a, 33b, 33c, and 33d can be increased.

In Equation 1, H denotes the distance between the lens array 32 and the light receiving portion array 33, and? Denotes the incident angle of the light incident on the lens array 32 through the light selecting portion 31 do.

The photodetectors 33a, 33b, 33c, and 33d may be photodiodes (photodiodes) themselves, and may include an electronic circuit connected to the photodiodes and the photodiodes to detect electrical signals.

The light receiving portions 33a, 33b, 33c and 33d having the above-described arrangement structure have a high light receiving efficiency and accordingly the photodiodes (not shown) constituting the light receiving portions 33a, 33b, 33c and 33d and the electronic circuits It is possible to detect an electric signal having high reliability through the non-display (not shown).

Other embodiments of the light-receiving portions 33a, 33b, 33c, and 33d are obvious to those skilled in the art, and a detailed description thereof will be omitted below.

Meanwhile, the optical sensor module 300 according to another embodiment of the present invention may be designed to detect only the intensity of light, assuming that the optical sensor module is used in the bio-optical response measurement. In this case, In the conventional CMOS image sensor, the color filter provided between the microlens array and the light receiving unit array may not be provided in the optical sensor module 300 of the present invention.

Without the color filter, the light sensor module 300 is more excellent in light receiving efficiency of the light receiving portions 33a, 33b, 33c, and 33d than when the color filter is mounted.

Hereinafter, an optical sensor module according to another embodiment of the present invention will be described.

6 is a view showing an optical sensor module 600 according to another embodiment of the present invention.

The optical sensor module 600 may be configured to accurately determine whether the direction of light incident on the optical selector 31 is the direction of incidence of the light desired by the user (for example, the first direction) And may further include an identification unit (34).

The incidence angle confirmation unit 34 may be formed on at least a part of the optical selection unit 31 or may be separately disposed beside the optical selection unit 31. [

 6, the incidence angle confirmation unit 34 is formed in a part of the light blocking unit 42 and includes a slit (not shown) passing through the light blocking unit 42 in parallel with the optical path in which the light in the first direction is incident slit). That is, the slit may be formed to pass through the light blocking portion 42 at an angle equal to the incident angle of the first direction light. Through such a structure, the light in the first direction incident on the incidence angle confirming unit 34 has a transmittance close to 100%, but the transmittance of light in other directions can be relatively lowered.

The light passing through the incident angle confirmation unit 34 is incident on one or more light receiving units 33a, 33b, 33c, and 33d disposed on the light path of the light and is incident on a photodiode (not shown) And can be detected and converted into an electric signal.

If the light passing through the incidence angle confirmation unit 34 is light in the first direction, the intensity of the detected electric signal will be the highest. If the light passing through the incident angle confirmation unit 34 is light in a direction other than the first direction, the intensity of the detected electric signal will be relatively lower than that in the former case.

Accordingly, the user can confirm whether the light incident on the optical sensor module 600 enters in a desired direction through the intensity of the electrical signal.

33b, 33c, and 33d on the light path of the first direction light that has passed through the incident angle confirmation unit 34, instead of the light receiving units 33a, 33b, 33c, and 33d, , It is possible to arrange the incident angle sensor unit 35 separately.

The incident angle sensor unit 35 can convert and detect the light incident on the incident angle sensor unit 35 into an electric signal in the same manner as the light receiving units 33a, 33b, 33c, and 33d described above.

Further, as another embodiment, the through direction of the slit may be not fixed but may be adjustable in various directions.

For example, if the user wishes to receive light having an incident angle of 30 degrees, the penetration direction of the slit can be adjusted to 30 degrees. When the slit is adjusted, the incident angle sensor unit 35 is provided to receive light passing through the slit, Can be changed.

Thus, when the intensity of the electric signal detected through the incident angle sensor unit 35 reaches a maximum value, it can be confirmed that the direction of incidence of light entering the optical sensor module 600 coincides with the direction of the slit.

Meanwhile, by forming a slit having a pattern on the upper surface of the light shielding part 42, it is possible to confirm whether the light entering the optical sensor module 600 is incident in a desired direction.

As shown in FIG. 7A, a slit having various patterns such as a circle, a cross, or a square can be formed on the upper surface of the light shielding portion 42.

The light receiving portions 33a, 33b, 33c and 33d of the light receiving portion array 33 can sense the amount of light and the light receiving portions 33a, 33b and 33c And 33d, the light passing through the pattern may be divided into a region where the light is incident on the light-receiving portion array 33 and a region where the light is not incident. Thus, the shape and width of the cross section of the light incident on the light-receiving portion array 33 can be confirmed.

When the shape and the width of the incident surface exactly coincide with the pattern formed on the upper surface of the light shielding portion 42, the light entering the optical sensor module 600 may be incident on the light incident surface The incident angle is 45 degrees).

Further, as shown in FIG. 7B, irregularities are formed on the surface portion 36 of the slit, or a diffusing environment is formed through a structure having roughness similar to that of the slit, The light in the undesired direction can be reflected and prevented from passing through.

As a result, according to the configuration of the optical sensor module according to the present invention described above, the interference due to the miscellaneous light can be reduced by blocking the light incident in the undesired direction through the optical selection unit. Therefore, As shown in FIG. In addition, by appropriately arranging the light-receiving portion, the loss of light reaching the entire light-receiving portion can be minimized, and an electrical signal with high reliability can be detected.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. It will be possible.

Therefore, the scope of the technical idea of the present invention is not limited by the embodiments disclosed in the present invention and the accompanying drawings. The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

300, 600: Optical sensor module
31:
32: lens array
33: Receiver array
34: Incident angle confirmation unit
35: Incident angle sensor unit
36: surface portion

Claims (7)

A lens array into which light is incident; And
And an array of light receiving portions for absorbing light passing through the lens array,
Wherein the light-receiving portion array includes at least one light-receiving portion set including a plurality of light-receiving portions,
And the light-receiving units belonging to the set of light-receiving units are spaced apart from the adjacent light-receiving units at equal intervals. The method according to claim 1,
Further comprising a light selector for passing light incident in the first direction and blocking light incident in the second direction,
Wherein light incident on the lens array passes through the light selection unit and is incident on the lens array. The method according to claim 1,
Wherein a convex lens is not disposed in an optical path of light incident on the lens array. 3. The method of claim 2,
Wherein the light selecting unit comprises:
Wherein the transmission spectrum of the light differs according to an incident angle of light incident on the optical selection unit. 3. The method of claim 2,
The optical selector
And a light blocking structure for blocking transmission of light incident in the second direction,
The light blocking structure may include a light absorbing material that absorbs light or a reflector that reflects light. 3. The method of claim 2,
And the light selection unit blocks light incident perpendicularly to the light selection unit. 3. The method of claim 2,
The light-
Wherein the optical sensor module is disposed at a vertically lower end of the lens in a horizontal direction by d of Equation (1).
Equation 1
d = H tan θ.
In Equation (1), H is a distance between the lens array and the light receiving portion array, and? Is an incident angle of light incident on the lens array in the first direction.

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