TWI704810B - Photography device - Google Patents

Abstract

A photography device includes a light transmitter, a light receiver, a processor, an adjustable focusing lens, and a driving module. The light transmitter is configured to transmit light to an object. The light receiver is configured to receive the reflected light. The processor is configured to generate a driving value according to the transmission and reception of the light. The adjustable focusing lens has a focal length. The driving module is configured to adjust the focal length by driving the adjustable focusing lens according to the driving value.

Description

Photographic device

The invention relates to a photographing device.

Generally speaking, in order to provide medical teaching, live broadcast for observation, and as evidence for future medical disputes, a photographing unit is installed on the surgical lighting equipment to record the operation process. However, due to the long distance between the photographing unit installed on the surgical lighting equipment and the surgical site, and the sight of the photographing unit is easily blocked by the head of the medical staff, it is often difficult to maintain good photographing quality.

In view of this, there is a kind of glasses-type photography equipment in which a camera is set on a spectacle structure and worn by the surgeon performing the operation. In this way, the camera is parallel to the doctor's line of sight, so it can record high-quality images. . Generally speaking, in order to provide a clear image, this kind of photography equipment usually uses a wider angle of view and does not require focusing. However, although this approach can make each part of the image roughly clear, if the image is partially enlarged in order to further view a specific part, the enlarged part will be limited by the resolution factor and cannot clearly show the image details.

Therefore, how to propose a photographing device that can solve the above-mentioned problems is one of the problems that the industry urgently wants to invest in research and development resources to solve.

In view of this, one object of the present invention is to provide a photographing device that can solve the above-mentioned problems.

To achieve the above objective, according to one embodiment of the present invention, a photographing device includes a light emitter, a light receiver, a processor, an adjustable focus lens, and a driving module. The light emitter is configured to emit light to the object. The light receiver is configured to receive the reflected light. The processor is configured to generate a driving value according to the emission and reception of light. The adjustable focusing lens has a focal length. The driving module is configured to drive the adjustable focus lens according to the driving value to adjust the focal length.

In one or more embodiments of the present invention, the processor is configured to generate a distance value according to the emission and reception of light, and is configured to generate a driving value according to the distance value.

In one or more embodiments of the present invention, the adjustable focus lens has a working range. The processor is configured to generate a driving value based on the distance value only when the distance value is within the working range.

In one or more embodiments of the present invention, the processor is further configured to generate a driving value according to the voltage-depth-of-field range comparison table, so that the distance value is substantially located in the center of the depth-of-field range corresponding to the driving value.

In one or more embodiments of the present invention, the optical receiver is configured to correspondingly generate an electrical signal when receiving the reflected light. The processor is also configured to filter out the noise in the electrical signal.

In one or more embodiments of the present invention, the adjustable focus lens is a liquid lens.

In one or more embodiments of the present invention, the photographing device further includes a light indicating module. The light indicator module is configured to emit indicator light to the object.

In one or more embodiments of the present invention, the light indicating module includes an indicating light source and a focusing lens. The indicating light source is configured to emit indicating light. The focusing lens is configured to focus the pointing light.

In one or more embodiments of the present invention, the photographing device further includes an image sensor. The image sensor is configured to sense the image of the object through the adjustable focus lens. The processor is also configured to generate a cropped image according to the irradiation range of the indicator light in the image.

In one or more embodiments of the present invention, the photographing device further includes an image sensor. The image sensor is configured to sense the image of the object through the adjustable focus lens.

In one or more embodiments of the present invention, the photographing device further includes a lens group. The lens group is optically coupled between the adjustable focusing lens and the image sensor. The image is obtained by optical magnification of the lens group.

In summary, the photographing device of the present invention adopts an optically enlarged viewing angle and a fast and dynamic auto-focusing technology to obtain an image of the local part desired by the user, and this image allows the user to obtain a clear and detailed image. High-resolution image details. The photographing device of the present invention also includes a light indicating module, so as to conveniently indicate to the user whether the current photographing position of the photographing device is the desired location.

The above description is only used to illustrate the problem to be solved by the present invention, the technical means to solve the problem, and the effects produced by it, etc. The specific details of the present invention will be described in detail in the following embodiments and related drawings.

100, 200‧‧‧Photographic installation

110‧‧‧Light Transmitter

120‧‧‧Optical Receiver

130‧‧‧Processor

140‧‧‧Adjustable focusing lens

150‧‧‧Drive Module

151‧‧‧Voltage generating unit

160‧‧‧Light indicator module

161‧‧‧Indicating light source

162‧‧‧focusing lens

170‧‧‧Image Sensor

180‧‧‧lens group

D1, D2, D3‧‧‧Depth of field range

V1, V2, V3‧‧‧Voltage value

In order to make the above and other objectives, features, advantages and embodiments of the present invention more comprehensible, the description of the accompanying drawings is as follows:

Figure 1 is a functional block diagram of a photographing device according to an embodiment of the present invention.

FIG. 2 is a diagram showing the relationship between voltage value and depth of field of the photographing device according to an embodiment of the present invention.

FIG. 3 is a functional block diagram of a photographing device according to another embodiment of the present invention.

Hereinafter, a plurality of embodiments of the present invention will be disclosed in the form of drawings. For clear description, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are unnecessary. In addition, in order to simplify the drawings, some conventionally used structures and elements will be shown in a simple schematic manner in the drawings.

Please refer to FIG. 1, which is a functional block diagram of a photographing apparatus 100 according to an embodiment of the present invention. As shown in FIG. 1, in this embodiment, the photographing device 100 includes a light transmitter 110, a light receiver 120, a processor 130, an adjustable focus lens 140, and a driving module 150. The light emitter 110 is configured to emit light to the object. The light receiver 120 is configured to receive the reflected light. The processor 130 is configured to generate a driving value according to the emission and reception of light. The adjustable focus lens 140 has a focal length. The driving module 150 is configured to drive the adjustable focus lens 140 according to the driving value to adjust the focal length. In some embodiments, the aforementioned driving value is a voltage value, but the invention is not limited to this.

In some embodiments, the photographing device 100 further includes an image sensor 170 and a lens group 180. The image sensor 170 is configured to sense an image of the object through the adjustable focus lens 140. The lens group 180 is optically coupled between the adjustable focus lens 140 and the image sensor 170.

In some embodiments, the lens group 180 includes a plurality of lenses. The function of these lenses is to provide an optically magnified imaging angle of view with a long depth of field. In some embodiments, each die of the image sensor 170 used has a larger image sensing area, so as to eliminate image noise.

With the aforementioned structural configuration, the photographing device 100 of this embodiment can adopt an optically enlarged viewing angle and cooperate with a fast and dynamic auto-focus technology to obtain an image of a local part desired by the user, and this image can be used by the user Obtain clear and high-resolution image details.

In some embodiments, the optical transmitter 110 is a laser transmitter, and the optical receiver 120 is a laser receiver, but the invention is not limited thereto. In other embodiments, the optical transmitter 110 is an infrared transmitter, and the optical receiver 120 is an infrared receiver.

In some embodiments, the driving module 150 is configured to drive the adjustable focus lens 140 with a driving value. Specifically, in some embodiments, the driving module 150 includes a voltage generating unit 151. The voltage generating unit 151 is configured to drive the adjustable focus lens 140 using the aforementioned driving value. Specifically, the voltage generating unit 151 generates a voltage according to the aforementioned driving value to drive the adjustable poly Focus lens 140.

In some embodiments, the processor 130 generates the distance value according to the time point when the light transmitter 110 emits light and the time point when the light receiver 120 receives light. For example, the processor 130 may instantly calculate the distance value according to the time difference between the time point when the light transmitter 110 emits light and the time point when the light receiver 120 receives the light according to a predetermined algorithm. In other embodiments, the processor 130 may also obtain the distance value corresponding to the aforementioned time difference value according to a preset time difference-distance comparison table.

In some embodiments, the processor 130 may further convert the distance value into a corresponding driving value in real time according to a predetermined algorithm. In other embodiments, the processor 130 may further obtain the driving value corresponding to the aforementioned distance value according to a preset distance-voltage comparison table. In some embodiments, the adjustable focus lens 140 is a liquid lens. Liquid lenses use liquid as a lens and change the focal length by changing the curvature of the liquid. After the processor 130 generates the aforementioned driving value, the voltage generating unit 151 generates a corresponding voltage to the adjustable focus lens 140 according to the driving value, that is, changes the shape of the adjustable focus lens 140 by applying a voltage, thereby changing its focal length . As a result, the photographing device 100 of this embodiment can automatically adapt to the object to be photographed, without the aid of a mechanical device. It only needs to change the two-pole voltage to modify the shape of the adjustable focusing lens 140 to achieve focusing and zooming. the goal of. Compared with a conventional lens, the photographing device 100 of this embodiment has the advantages of small size, low price, low power consumption, fast zoom speed, long life, and good imaging quality.

In some embodiments, the light receiver 120 can correspondingly generate an electrical signal when receiving the reflected light. The processor 130 is also configured to filter out electrical signals In the noise. For example, when the distance value generated by the processor 130 changes drastically (for example, from 30 cm to 3 cm), the processor 130 may filter out the drastically changed distance value without adopting it. In this way, the photographing device 100 of this embodiment prevents the adjustable focus lens 140 from adjusting its focal length in response to noise, thereby providing a better user experience.

In some embodiments, the adjustable focus lens 140 has a working range. The processor 130 is configured to generate a driving value according to the distance value only when the distance value is within the working range. For example, the adjustable focus lens 140 has a working range of about 4 cm to about 200 cm. When the distance value generated by the processor 130 is less than 3 cm, the lower limit of the adjustable focal length of the adjustable focus lens 140 is exceeded, so the processor 130 does not need to generate a driving value according to the distance value. When the distance value generated by the processor 130 is greater than 200 cm, it has exceeded the upper limit of the adjustable focal length of the adjustable focus lens 140, so the processor 130 does not need to generate a driving value according to the distance value. In this way, the photographing device 100 of this embodiment can drive the adjustable focus lens 140 to adjust its focal length only when necessary, thereby reducing energy consumption and prolonging the service life of parts.

Please refer to FIG. 2, which is a graph showing the relationship between the voltage value and the depth of field of the photographing device 100 according to an embodiment of the present invention. As shown in Fig. 2, the object photographed by the photographing device 100 of this embodiment is an apple as an example. After the processor 130 generates the distance value, the voltage generating unit 151 uses any one of the voltage values V1, V2, V3 to drive the adjustable focus lens 140 so that the apple is located in the range of depth of field D1, D2, D3, so that both Obtain clear apple images. However, as shown in Figure 2, when there is a small change in the distance detection, the apple is likely to exceed the depth of field range D1, D3, and obviously the voltage value V2 is the better choice. Therefore, Yu Yi In some embodiments, the voltage value V2 generated by the processor may make the distance value substantially located in the center of the depth-of-field range D2. In practice, the complete voltage-depth-of-field range comparison table of the photographing device 100 can be obtained through experimental tests based on the above principles.

Please refer to FIG. 3, which is a functional block diagram of a photographing device 200 according to another embodiment of the present invention. Compared with the embodiment shown in FIG. 1, the photographing device 200 in this embodiment further includes a light indicating module 160. The light indicating module 160 is configured to emit indicating light to the object. Specifically, in some embodiments, the light indicating module 160 includes an indicating light source 161 and a focusing lens 162. The indicating light source 161 is configured to emit indicating light. The focus lens 162 is configured to focus the pointing light. Since the light beam angle of the indicator light after being focused by the focusing lens 162 is small, it has a focused search light effect, so as to conveniently indicate to the user whether the position photographed by the photographing device 200 is a predetermined position (for example, a surgical site).

In some embodiments, the indicating light source 161 is a light-emitting diode, but the invention is not limited to this. In practical applications, it can also be replaced with other similar light sources.

In some embodiments, the light emitted by the light emitter 110 may be irradiated in a direction substantially the same as the shooting direction of the photographing device 200 to reduce focus error. In some embodiments, the focused indicator light can be irradiated in substantially the same direction as the photographing direction of the photographing device 200 to reduce indication errors.

In some embodiments, the processor 130 is further configured to generate a cropped image according to the irradiation range of the indicator light in the image. For example, the irradiation range of the indicator light in the original image captured by the image sensor 170 occupies the original image The area is about 30%. After being processed by the processor 130, the irradiation range of the indicator light in the cropped image occupies about 70% of the area of the cropped image, and the position is approximately in the center of the cropped image. When the object to be photographed is too close, the illumination range of the indicator light in the original image will be more downward. At this time, the cropping range of the cropped image will also move downward, so that the illumination range of the indicator light is still roughly in the cropped image. The center. In this way, the photographing device 200 of this embodiment can automatically generate a clear image corresponding to the irradiation range of the indicator light according to the irradiation range of the indicator light. In addition, it should be noted that the size (photosensitive range) of the image sensor 170 needs to be larger than the image range to be displayed or stored in order to perform the above-mentioned cropping process.

From the above detailed description of the specific embodiments of the present invention, it can be clearly seen that the photographing device of the present invention adopts an optically magnified viewing angle and cooperates with a fast and dynamic auto-focusing technology to obtain the local parts desired by the user. This image allows users to obtain clear and high-resolution image details. The photographing device of the present invention also includes a light indicating module, so as to conveniently indicate to the user whether the current photographing position of the photographing device is the desired location.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be subject to the scope of the attached patent application.

100‧‧‧Photographic installation

110‧‧‧Light Transmitter

120‧‧‧Optical Receiver

130‧‧‧Processor

140‧‧‧Adjustable focusing lens

150‧‧‧Drive Module

151‧‧‧Voltage generating unit

170‧‧‧Image Sensor

180‧‧‧lens group

Claims (8)

A photographing device, comprising: a light emitter configured to emit a light to an object; a light receiver configured to receive the reflected light; and a processor configured to generate a light based on the emission and reception of the light Drive value; an adjustable focus lens with a focal length; a drive module configured to drive the adjustable focus lens according to the drive value to adjust the focal length; a light indicator module configured to emit an indicator light to the object And an image sensor configured to sense an image on the object through the adjustable focus lens, wherein the processor is also configured to generate a cropped image according to an illumination range of the indicator light in the image, As a result, the irradiation range is in the center of the cropped image. The photographing device according to claim 1, wherein the processor is configured to generate a distance value according to the emission and reception of the light, and is configured to generate the driving value according to the distance value. The photographing device according to claim 2, wherein the adjustable focus lens has a working range, and the processor is configured to generate the driving value according to the distance value only when the distance value is within the working range. The photographing device according to claim 2, wherein the processor It is also configured to generate the driving value according to a voltage-depth-of-field range comparison table, so that the distance value is substantially located at the center of a depth-of-field range corresponding to the driving value. The photographing device according to claim 1, wherein the light receiver is configured to correspondingly generate an electrical signal when receiving the reflected light, and the processor is also configured to filter out noise in the electrical signal. The photographing device according to claim 1, wherein the adjustable focus lens is a liquid lens. The photographing device according to claim 1, wherein the light indicating module includes: an indicating light source configured to emit the indicating light; and a focusing lens configured to focus the indicating light. The photographing device according to claim 1, further comprising a lens group optically coupled between the adjustable focus lens and the image sensor, wherein the image is obtained by optically magnifying the lens group.

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