TWI505150B - Pen-shape optical sensing device - Google Patents

Description

Pen type optical sensing device

The present invention relates to a pen-type optical sensing device, and more particularly to a pen-type optical sensing device having a high tilting use angle and high image quality.

With the advancement of technology, the industry has developed a variety of optical sensing devices that are used in different electronic devices. For example, it can be applied to optical mice, scanners, multifunction printers, optical fingerprinting systems, etc., and optical sensing devices in these electronic devices are used to capture or sense optical imaging of an object or Image variation.

Generally, a user operates an electronic device, such as a desktop computer, by means of an optical mouse. The conventional optical mouse includes an optical sensing device, and the user can hold the optical mouse to move the optical mouse on the desktop. The optical sensing device measures the image variation of the light emitted by the object to the object, thereby changing the cursor displayed on a display of the electronic device. In this way, the user can adjust the commands or operations for this computer. However, when using an optical mouse, the user often needs to adjust and move the wrist to move the mouse. Thus, when the user uses the optical mouse for a long time, it is necessary to constantly adjust and move the wrist, which may easily cause pain or discomfort to the user's wrist.

Then, the manufacturer developed a pen-type mouse whose optical sensing device is disposed at one end of a rod, and the optical sensing device includes a light-emitting element and an inductor. The illuminating element is located on one side within the barrel and the sensor is located on the other side within the barrel. When the illuminating element emits an incident ray on an object (for example, a table top), the incident ray forms an incident angle greater than zero with the normal of the table top, and the object generates reflected light, and the reflected light reflects to the sensor, and the sensor performs an image on the image. After processing, the image is converted into an electronic signal for subsequent processing by the pen type mouse. Wherein, the reflected light and the normal of the table top generate a reflection angle greater than zero degrees, and the incident angle is equal to the reflection angle. In general, when the user holds the pen-type mouse, there are often different habits of the person, so that the pen holder is held at various angles inclined to the table top. When the pen-type mouse of the prior art is used at various tilt angles, problems such as uneven brightness and unclear image (modulus function modulus (MTF) value is too low) are generated, and the sensing member cannot be used. Draws bright light and sharply imaged images, which greatly reduces the sensitivity of the pen-type mouse and reduces the sensitivity of the pen-type mouse.

In view of the above problems, the present invention discloses a pen-type optical sensing device, thereby solving the above problems of uneven brightness, unclear image, and low sensitivity.

An embodiment of the invention discloses a pen-type optical sensing device comprising a pen, a circuit board assembly and an optical sensing device. The pen holder extends along an axial direction. The circuit board assembly is disposed within the pen holder. Optical sensing device It is disposed at one end of the pen holder and electrically connected to the circuit board assembly. The optical sensing device comprises at least one illuminating member, a light guiding member, a lens and a sensing member. At least one illuminating member is configured to emit a light. The light guiding member is configured to concentrate the guiding light along an illumination path to an object, and the object reflects a reflected light. The lens is used to guide the reflected light. The sensing component has an image taking path, and the sensing component is configured to extract reflected light from an object (for example, a desktop) through the image capturing path, and the illumination path and the image capturing path tend to be coaxial.

According to the pen type optical sensing device disclosed in the present invention, the illumination path and the image capturing path tend to be coaxial. Therefore, when the pen holder is tilted at a large angle with respect to the object, the pen-type optical sensing device can still obtain a uniform and clear image, thereby improving the sensitivity of the pen-type optical sensing device. Therefore, when the pen-type optical sensing device is used on the object (for example, a tabletop), the pen-type optical sensing device can be flexibly and smoothly used, and the range of the operating angle of the pen-type optical sensing device can be further improved. Thus, the present invention solves the problem that the pen-type optical sensing device of the prior art is insensitive to use in a wide angle range of use due to uneven brightness and poor imaging (low MTF value).

Furthermore, compared with the prior art, the incident light and the reflected light have an acute angle to increase the volume, and the light path of the pen-type optical sensing device of the present invention tends to be coaxial with the image path of the reflected light, so Make the volume greatly smaller.

In some embodiments, the axial direction of the pen holder and the image capturing path have an acute angle, and the pen-type optical sensing device can obtain a uniform and clear image when the pen holder is tilted at a large angle with respect to the object.

The above description of the contents of the present invention and the following implementers The description of the present invention is intended to be illustrative and to explain the principles of the invention.

1‧‧‧ pen type optical sensing device

10‧‧‧ pen

11‧‧‧ first end

12‧‧‧ second end

13‧‧‧ accommodating space

20‧‧‧Circuit board components

21‧‧‧Power Module

22‧‧‧Wireless transceiver module

30‧‧‧Optical sensing device

31‧‧‧Lighting parts

32‧‧‧Light guides

321‧‧‧ incident section

321a‧‧‧Glossy

322‧‧‧Outlet Department

322a‧‧‧Glossy

323‧‧‧through holes

323a‧‧ first opening

323b‧‧‧ second opening

33‧‧‧ lens

331‧‧‧ ‧ side

332‧‧‧like side

34‧‧‧Induction parts

35‧‧‧Microcircuit board

40‧‧‧ pen head

41‧‧‧ Fixed Department

42‧‧‧Demolition Department

421‧‧‧Export

A‧‧‧Axial

C‧‧‧Image path

Θ‧‧‧ acute angle

1 is a schematic view of a one-shot optical sensing device in accordance with an embodiment of the present invention.

2 is a partially enlarged schematic view of a pen-type optical sensing device according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view showing an optical sensing device according to an embodiment of the present invention.

4 is a cross-sectional view showing an optical sensing device according to another embodiment of the present invention.

FIG. 5A is a luminance distribution diagram of a one-piece optical sensing device according to an embodiment of the present invention.

Fig. 5B is a luminance distribution diagram of a one-piece optical sensing device of the prior art.

FIG. 6A is a diagram showing a sharpness (MTF) simulation analysis of a linear optical sensing device according to an embodiment of the present invention in which the axial direction and the image capturing path are clamped at 30 degrees and the axial direction is 55 degrees from the object normal.

FIG. 6B is a diagram showing a sharpness (MTF) simulation analysis of the axial and object normal clips in a one-piece optical sensing device of the prior art.

FIG. 7A is a diagram showing brightness of a pen-type optical sensing device according to an embodiment of the invention Distribution.

Fig. 7B is a luminance distribution diagram of a pen type optical sensing device of the prior art.

8A is a simulation analysis diagram of a sharpness (MTF) of a pen-type optical sensing device according to another embodiment of the present invention, in which the axial direction of the sheath is clamped to the imaging path by 45 degrees and the axial direction is 70 degrees from the normal of the object.

FIG. 8B is a diagram showing a 70 degree sharpness (MTF) simulation analysis of the axial and object normal clips in another pen type optical sensing device of the prior art.

FIG. 9A is a diagram showing a luminance distribution of a pen-type optical sensing device according to another embodiment of the present invention.

Fig. 9B is a luminance distribution diagram of another pen type optical sensing device of the prior art.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

The invention provides a pen-type optical sensing device for connecting an electronic device in a wireless or physical electrical connection manner. A user manipulates the pen-type optical sensing device to provide a control command to the electronic device. For example, when the user manipulates the pen-type optical sensing device to move on an object, the electricity can be made A cursor on a graphical interface displayed by a display of the sub-device performs a relative displacement. The user can move the cursor to different icons on the graphical interface to control the electronic device to execute different programs. Further, the pen type optical sensing device of the present invention may be referred to as a pen type optical mouse.

Please refer to "1st picture" and "2nd picture" at the same time. 1 is a schematic view of a one-piece optical sensing device according to an embodiment of the present invention. FIG. 2 is a partially enlarged schematic view of a pen-type optical sensing device according to an embodiment of the present invention. In accordance with an embodiment of the present invention, a pen-type optical sensing device 1 is disclosed that includes a pen 10, a circuit board assembly 20, and an optical sensing device 30. The pen holder 10 extends along an axial direction A. In the present embodiment, the pen holder 10 has a first end 11 and a second end 12 opposite to each other and an accommodating space 13 located in the pen holder 10. The circuit board assembly 20 is disposed in the accommodating space 13 in the pen holder 10. The optical sensing device 30 is disposed at the first end 11 of the pen holder 10 and electrically connected to the circuit board assembly 20, and the optical sensing device 30 is also located at one end of the accommodating space 13.

In other embodiments of the present embodiment and some of the embodiments, the pen-type optical sensing device 1 further includes a pen head 40 disposed at the first end 11 of the pen holder 10 for covering most of the optical sensing device 30. The pen tip 40 has a fixing portion 41 and a detaching portion 42. The fixing portion 41 is fixedly disposed at the first end 11 of the sheath 10, and the detaching portion 42 is coupled to the fixing portion 41. In the present embodiment, the detaching portion 42 is fixed to the fixing portion 41 by screws. However, in other embodiments, other means may be used to secure the fixing portion 41 and the detaching portion 42 to each other. For example, solid The fixed portion 41 and the detaching portion 42 may each include a corresponding threaded portion, and the detaching portion 42 is rotatably disposed on the fixing portion 41; or the fixing portion 41 and the detaching portion 42 are fixed to each other in a snapping manner; or, the writing head 40 The fixing portion 41 and the detaching portion 42 are integrally formed. In addition, the detaching portion 42 has an outlet 421 to expose one end of the optical sensing device 30. However, in other embodiments, the pen-type optical sensing device 1 may also not include the pen tip 40, but expose the optical sensing device 30 directly from the first end 11 to the outside and directly to the pen holder 10.

In the present invention, the axial direction A of the sheath 10 is defined as the direction in which the first end 11 to the second end 12 of the sheath 10 extend.

In this embodiment and some other embodiments, the circuit board assembly 20 is configured to process signal transmission between the electronic device (not shown) and the optical sensing device 30. In this embodiment and some other embodiments, the circuit board assembly 20 includes a power module 21 and a wireless transceiver module 22. The power module 21 is used to provide electrical energy. The power module 21 can be a detachable or non-removable battery, and can be a rechargeable or disposable battery, but the type of the battery is not intended to limit the present invention. The wireless transceiver module 22 is configured to receive and transmit signals to the electronic device by using a wireless transmission technology. The wireless transmission mode may be Bluetooth, Wi-Fi (Wireless Fidelity), infrared, or other conventional technologies. The transmission method is not described here. In addition, in other embodiments, the circuit board assembly 20 does not include the power module 21 and a wireless transceiver module 22, and the pen-type optical sensing device 1 is electrically connected to the electronic device by a physical cable, and the electronic device provides power. And the signal to the pen-type optical sense Measuring device 1. Furthermore, a plurality of buttons (not shown) may be disposed on the pen holder 10 to drive the circuit board assembly 20 to transmit signals. For example, the button is used to adjust the switch, resolution (eg, dpi, dots per inch) of the pen-type optical sensing device 1, or give the electronic device a command to cause the electronic device to execute the relevant program.

The structure of the optical sensing device 30 will be described in detail below. Please refer to FIG. 2 and FIG. 3 simultaneously. FIG. 3 is a schematic cross-sectional view of an optical sensing device according to an embodiment of the present invention. In this embodiment, the optical sensing device 30 includes a light emitting member 31, a light guiding member 32, a lens 33, and a sensing member 34. In the embodiment, the optical sensing device 30 further includes a micro circuit board 35. The microcircuit board 35 is fixedly and electrically connected to the circuit board assembly 20, and the light emitting member 31 and the sensing member 34 are fixedly disposed on the micro circuit board 35. The micro circuit board 35 is used to control the illumination of the illuminating member 31 and to control image capturing, image processing and signal transmission of the sensing member 34.

In this embodiment, the illuminating member 31 is configured to emit light (not shown). In this embodiment, the light emitting device 31 is a Light Emitting Diode (LED) for emitting a blue light, a red light or an infrared light. However, the type of the above-described illuminating member 31 and the type of ray it emits are not intended to limit the present invention.

In the embodiment, the light guiding member 32 has an incident portion 321 , an emitting portion 322 , and a through hole 323 . The incident portion 321 and the exit portion 322 are respectively located on opposite sides. In the present embodiment, the width of the light guide 32 is tapered from the incident portion 321 toward the exit portion 322, and the width of the incident portion 321 is larger than the exit portion 322. The width. Further, the through hole 323 penetrates the incident portion 321 and the emission portion 322 such that the through hole 323 has a first opening 323a located in the incident portion 321 and a second opening 323b located in the emitting portion 322. The light incident member 31 has a light incident surface 321a at both ends of the incident portion 321 , and the light emitting member 31 faces the light incident surface 321 a of the incident portion 321 of the light guide 32 . Therefore, when the light-emitting member 31 emits light, the light enters the light guide 32 from the light-incident surface 321a. The emitting portion 322 has a light emitting surface 322a, and the light can be continuously reflected and guided from the light guiding member 32, and then emitted outward through the light emitting surface 322a. In this embodiment. The area of the light incident surface 321a is smaller than the area of the light exit surface 322a, so that the light can be concentrated to effectively produce an image with uniform brightness and sharpness. In the present embodiment, the material of the light guiding member 32 is a light transmissive plastic and the light guiding member 32 is an inverted tapered structure. In other embodiments, the material of the light guide 32 is other materials that can transmit light, such as glass. In the present invention, the light guide member 32 is configured to receive the light emitted from the light-emitting member 31 from the light-incident surface 321a, and the light is reflected, refracted or directly reflected in the light guide member 32, so that the light is surrounded by the second opening 323b. The light exit surface 322a is emitted. Then, the light is emitted through an exiting path 421 along an illumination path (not shown) onto an object (for example, a table top) to form a bright surrounding spot on the object. That is to say, the area of the inverted cone and the annular structure and the light incident surface 321a of the light guiding member 32 is smaller than the area of the light emitting surface 322a, so that the light can be concentrated and guided, thereby causing the light emitted from the light emitting member 31 to follow. The illumination path converges to form a surrounding spot on the object to produce an image that is uniform and sharp.

In the present invention, the "irradiation path" is defined as the illuminating member 31 After the emitted light is concentrated and emitted from the light guide 32, the light is projected onto the traveling path of the object.

In the present embodiment, the lens 33 is disposed in the through hole 323 and has an object side surface 331 and an image side surface 332. In the present embodiment, the lens 33 is interposed between the light guides 32. The lens 33 is for receiving reflected light and centrally guiding it to the sensing member 34 to cause the sensing member 34 to receive imaging of the reflected light. In detail, after the light hits the object, a surrounding spot is formed on the object, and a reflected light (not shown) is generated around the spot of the object, and the reflected light is again sequentially from the outlet 421 of the detaching portion 42 and the second opening. 323b enters the optical sensing device 30. Thereafter, the reflected light penetrates through the lens 33, and the reflected light is collectively guided by the lens 33 to the sensing member 34 for imaging. Furthermore, the material of the lens 33 is a light transmissive plastic or glass, and both the object side surface 331 and the image side surface 332 of the lens 33 are convex, but the arrangement position, material and shape are not intended to limit the present invention. In addition, in the embodiment and some other embodiments, the lens 33 is disposed between the second opening 323b and the sensing member 34 and is adjusted correspondingly to achieve the imaging effect. Furthermore, the object side surface 331 and the image side surface 332 of the lens 33 may be planar, concave or convex depending on actual needs.

The sensing member 34 is located at the first opening 323a. The sensing member 34 has an imaging path C for sensing the reflected light from the lens 33 via the imaging path C. The sensing component 34 converts the image into a digital signal for transmission to the circuit board assembly 20. In the present invention, the "image taking path C" is defined as the progress of the reflected light reflected by the object from the lens 33 to the sensing member 34. path.

It should be noted that in the present invention, the illumination path and the imaging path C tend to be coaxial. The "coaxiality" of the present invention is defined as the minimum angle of intersection between the illumination path and the imaging path C. When the inclination of the pen-type optical sensing device is changed, the variation around the spot-off path C is extremely small.

In the present invention, the axial direction A and the orientation path C have an acute angle θ (for example, 30 degrees). Thus, when the pen-type optical sensing device 1 is used on an object such that the pen holder 10 has an angle θA (for example, 45 degrees) with the normal of the object, the orientation path C intersects the normal of the object at an angle θB (ie, θB). Equal to θA minus θ, 45 degrees minus 30 degrees equals 15 degrees). The variation of the orientation path C is small (15 degrees compared to 45 degrees), and the variation of the spot generated by the optical sensing device 30 is also small, so that the pen-type optical sensing device 1 still has good illumination uniformity, and Get a clear and clear image. In this way, in the present case, the inclination angle of the pen-type optical sensing device 1 and the object can be greatly expanded, and the pen-type optical sensing device 1 can be more flexibly used. Furthermore, the above acute angle θ can be any angle less than 90 degrees and greater than 0 degrees, which can achieve the effect of the present invention.

However, in the above embodiment, the number of the light-emitting members 31 of the optical sensing device 30 is one, but the number thereof is not intended to limit the present invention. In other embodiments, please refer to FIG. 4, which is a schematic cross-sectional view of an optical sensing device according to another embodiment of the present invention. The structure of this embodiment is similar to that of the above embodiment, so the details are not described again. In this embodiment, the optical sensing device 30 includes two illuminating members 31 respectively disposed on the micro circuit board 35. The opposite ends of the incident portion 321 of the light guide 32 are provided. In this way, brighter illumination can be obtained while maintaining the same volume shape. In other embodiments, the number of the light-emitting members 31 is two or more, and the light-emitting brightness of the optical sensing device 30 can be improved.

In other embodiments, the optical sensing device 30 further includes a support member (not shown), one end of which is fixed to the micro circuit board 35, and the other end of which is located in the through hole 323 between the light guide members 32. The lens 33 is fixed so that the lens 33 is firmly disposed between the sensing member 34 and the second opening 323b.

Please refer to "5A" and "5B" at the same time, wherein "5A" is a brightness distribution diagram of a one-piece optical sensing device according to an embodiment of the present invention, and "5B" is a conventional technique. A brightness profile of a one-piece optical sensing device. Wherein, the pen-type optical sensing device is oriented to an object (this test is a photosensitive member) and presents a sensing area, and the units of the horizontal axis and the vertical axis are all mm (the horizontal axis is 1 mm wide, and the vertical axis is 1 mm long). ). The intermediate diagrams respectively illuminate the luminance portion of the sensing region for the pen-type optical sensing device of the present invention and the prior art. In addition, the left image is the brightness comparison chart, the lower image (Current X Slice image) refers to the horizontal brightness distribution through the midpoint of the sensing area, and the right picture (Current Y Slice) refers to passing through the sensing area. The vertical brightness distribution of the point. From the "Fig. 5B", the optical sensing device of the prior art has a non-uniform brightness (unit lux), and the average difference (V) is 0.43149 (when the average difference is lower, the higher the uniformity is) and the maximum brightness. The area is to the right and not in the center of the sensing area. As such, the sensing member cannot achieve good imaging. Compared with the optical sensing device of the present case 5A picture, its brightness is uniform, the average difference is 0.21538, and the maximum brightness is also in the center of the sensing area, which is obviously superior to the conventional optical sensing device. Therefore, the sensing member can obtain accurate and stable imaging. That is, the pen-type optical sensing device of the present invention can detect more accurate image variation, thereby improving the sensitivity of the pen-type optical sensing device.

The following is a comparison of the brightness and sharpness of the pen-type optical sensing device of the present invention and the pen-type optical sensing device of the prior art at different inclinations. In this experiment, the angle between the axial direction of the pen and the image capturing path of the pen-type optical sensing device of the present invention is set to 30 degrees, and the pen of the present invention and the conventional pen-type optical sensing device are opposite to the sensing region. The line is inclined at an angle of 55 degrees.

As shown in FIG. 6A and FIG. 6B, FIG. 6A is a sharpness (MTF) simulation analysis diagram (or optical modulus) of a one-piece optical sensing device according to an embodiment of the present invention. The function (Modulation Transfer Function (MTF) graph), "Fig. 6B" is a sharpness (MTF) simulation analysis diagram of a conventional optical sensing device of the prior art, and the horizontal axis in the figure represents each mm The spatial frequency in Cycles per mm (unit is line-pair/mm), and the vertical axis represents the Modulus of Modulation Transfer Function. Comparing "6A" and "6B", it can be easily seen that the resolution (or sharpness) of the imaging in the vertical direction (T) and the horizontal direction (S) of each field of view is significantly better than the conventional technique.

In addition, as shown in "7A" and "7B", the brightness of the pen type optical sensing device of "Phase 7A" is "Phase 6A". The distribution map, "Fig. 7B" is the brightness distribution map of the pen type optical sensing device of "Fig. 6A". The illustration shows that the uniformity of illumination in this case is better (the average difference in this case is 0.242, the conventional technique is 0.742). In addition, the maximum brightness area of the case is slightly lower left, and the maximum brightness area of the conventional pen-type optical sensing device is obviously far from the center point.

In addition, in another experiment, the angle between the axial direction of the pen and the image capturing path of the pen-type optical sensing device of the present invention is set to 45 degrees, and the pen of the present invention and the conventional pen-type optical sensing device are opposite to the sensing. The normal angle of the zone is 70 degrees.

As shown in FIG. 8A and FIG. 8B, FIG. 8A is a sharpness (MTF) simulation analysis diagram of a one-piece optical sensing device according to another embodiment of the present invention, and FIG. 8B A sharpness analysis (MTF) simulation analysis diagram of a one-piece optical sensing device of the prior art. As can be seen from the figure, the resolution of the pen-type optical sensing device of this case is superior to the prior art compared to the experimental differences shown in "Fig. 6A" and "Fig. 6B". That is to say, when the tilt angle is larger, the resolution of the conventional technique is worse, and the image quality of the pen type optical sensing device provided in the present case is significantly smaller.

Further, as shown in FIG. 9A and FIG. 9B, FIG. 9A is a luminance distribution diagram of a one-piece optical sensing device according to another embodiment of the present invention, and FIG. 9B is a conventional technique. A brightness profile of a one-piece optical sensing device. The illustration shows that the illumination in this case is relatively uniform (the average difference in this case is 0.242, and the conventional technique is 0.79). In addition, the deviation distance of the maximum brightness area of the case Less away. The maximum brightness area of the conventional pen-type optical sensing device is significantly farther away from the center point when it was not tilted.

In summary, in the pen-type optical sensing device disclosed in the present invention, since the axial direction of the sheath and the imaging path of the optical sensing device have an acute angle, and the illumination path and the imaging path of the optical sensing device tend to be coaxial, When the user uses the pen-type optical sensing device at a large angle, the optical sensing device can still obtain images with better uniformity and clear imaging, and maintain the sensitivity and smoothness of the pen-type optical sensing device, and can improve the pen type. The range of operating angles of the optical sensing device. In addition, the pen-type optical sensing device can be applied to a variety of smooth and rough working surfaces such as the palm, book or table. Therefore, the present invention solves the problem that the pen-type optical sensing device in the prior art is insensitive to use in a wide angle range of use due to uneven brightness and poor imaging (low MTF value).

Furthermore, compared with the prior art, the incident light and the reflected light have an acute angle to increase the volume, and the light path of the pen-type optical sensing device of the present invention is coaxial with the image capturing path of the reflected light, thereby enabling the volume. Significantly reduced. In addition, since the area of the light incident surface of the light guide member is smaller than the area of the light exit surface, the light can be concentrated to guide the image to obtain a uniform and clear image.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of patent protection of the invention shall be defined by the scope of the patent application attached to this specification. Prevail.

10‧‧‧ pen

11‧‧‧ first end

13‧‧‧ accommodating space

20‧‧‧Circuit board components

21‧‧‧Power Module

22‧‧‧Wireless transceiver module

30‧‧‧Optical sensing device

32‧‧‧Light guides

33‧‧‧ lens

35‧‧‧Microcircuit board

40‧‧‧ pen head

41‧‧‧ Fixed Department

42‧‧‧Demolition Department

421‧‧‧Export

A‧‧‧Axial

C‧‧‧Image path

Θ‧‧‧ acute angle

Claims (8)

A pen-type optical sensing device comprising: a rod extending along an axial direction; a circuit board assembly disposed in the pen holder; and an optical sensing device disposed at one end of the pen and electrically connected to the circuit board The optical sensing device comprises: at least one illuminating member for emitting a light; a light guiding member having an incident portion and an emitting portion opposite to each other, the incident portion having a light incident surface, the emitting portion having a a light emitting surface, the light emitted by the at least one illuminating member enters the light guiding member from the light incident surface and is emitted from the light emitting surface, wherein an area of the light incident surface is smaller than an area of the light emitting surface, and the light is compared by an area The light-incident surface enters the light guide member, and is continuously reflected and guided in the light guide member, and then the light-emitting surface with a larger area faces the outer edge along an illumination path to an object to form a bright spot. The object reflects a reflected light; a lens for guiding the reflected light; and a sensing member having an image taking path, the sensing member is configured to capture the reflected light from the lens through the image capturing path, and The illumination road It tends to be coaxial with the imaging path. The pen-type optical sensing device of claim 1, wherein the axial direction has an acute angle with the imaging path. The pen-type optical sensing device of claim 1, wherein the light guide has a through hole penetrating the incident portion and the emitting portion, the through hole having a first opening and a second opening, wherein the at least one illuminating member is located at the incident portion, and the sensing member corresponds to the first opening. The pen-type optical sensing device of claim 1, wherein the incident portion has a width greater than a width of the exit portion. The pen-type optical sensing device of claim 1, wherein when the number of the at least one illuminating member is two, the two illuminating members are respectively disposed at opposite ends of the incident portion of the light guiding member. The pen-type optical sensing device of claim 3, further comprising a head disposed outside the optical sensing device, the pen head having an outlet corresponding to the second opening of the through hole. The pen-type optical sensing device of claim 1, wherein the pen holder has an accommodating space, the circuit board assembly is disposed in the accommodating space, and the optical sensing device is located at one end of the accommodating space. The pen-type optical sensing device of claim 1, wherein the circuit board assembly comprises a power module and a wireless transceiver module, and the at least one light-emitting component is a light-emitting diode module.