TWI486632B - Camera device and projector device having protective lens - Google Patents

Description

Image capturing device with protective mirror and projection device

The present invention relates to an image taking device and a projection device, and more particularly to an image capturing device having a protective mirror and a projection device.

In recent years, due to the technical advancement of digital camera devices, conventional film-based exposure devices have been gradually replaced by digital camera devices, and as the pixels of digital camera devices continue to increase, the size of sensing elements has become smaller and smaller. The photosensitive element pixels of the sensing element (for example, a Charge-coupled Device (CCD) or a Complementary Metal-Oxide-Semiconductor (CMOS)) are arranged in an array. When the object has a regular spatial frequency of arrangement, and if the spatial frequency of the arrangement is greater than or equal to one-half of a sampling frequency of the sensing element, an aliasing effect occurs, and thus a moiré phenomenon occurs. This is a characteristic that is not available in the film exposure type image pickup device. Most low-end digital cameras are prone to moiré in parts of detail when shooting objects such as hair and diagonal stripes, so that the final output is a picture with chromatic aberration or defects.

In order to solve this problem, the conventional technique generally uses quartz as a birefringent crystal and places it in the optical path to cause the quartz to generate two-refracted light having an optical path difference between the two refracted rays, and the two refracted rays respectively enter corresponding The photosensitive unit pixel is used to eliminate the aliasing effect. However, because the quartz hardness is lower than that of sapphire, it is not suitable for being placed outside the lens, and the placement of the optical path makes the digital camera device bulky, and because of this, only large-scale digital monocular cameras or digital cameras are large. The device has enough space to place the quartz in the light path.

Please refer to the first figure, which is a schematic diagram of a conventional high-order digital camera device 10. The conventional high-order digital camera device 10 includes an optical lens 101, a mirror 102, a mirror shutter 103, a low-pass filter 104, a CMOS image sensing device 105, an image processing module 106, and a liquid crystal display. 107. The low pass filter 104 includes a first birefringence mirror 1041, a second birefringence mirror 1042, and an infrared filter 1043 that blocks the entry of infrared rays.

The light 14 reflected from the object 12 enters the optical lens 101 and passes through the mirror The shutter 103 reflects and enters the other mirror 102 to change the direction of the light path of the light 14 and to change the up, down, left and right directions of imaging of the object 12. The mirror 102 can reflect the light again and enter the viewing window (not shown), and guide the image in the up, down, left, and right directions of the object 12. After the operator completes the focus and sets the shutter time and the aperture size, pressing the shutter button causes the mirror shutter 103 to be opened to allow the light 14 to enter the rear low pass filter 104 and then enter the sensing element 105. The sensing component 105 receives the signal of the light 14 and converts it into a digital signal. The digital signal is processed by the image processing module to output an image to the LCD display 107 for viewing.

In the first figure, the first birefringent mirror 1041 and the second birefringent mirror 1042 The materials used are, for example, quartz and all have only a single optical axis. When the light 14 enters the first birefringent mirror 1041, if the traveling direction of the light 14 is not parallel to the single optical axis, the refracted light is formed when the light 14 enters the first birefringent mirror 1041. The refracted light of one of the two refracted lights conforms to the law of refraction and is called ordinary light or o light; the other of the two refracted lights does not conform to the law of refraction and is called extraordinary light or e Light. After the light 14 passes through the first birefringent mirror 1041, two mutually staggered and mutually parallel lights are emitted, resulting in a double image that is staggered from each other. Similarly, when the mutually parallel light is incident on the second birefringent mirror, two mutually staggered and mutually parallel lights are formed, and each of the mutually parallel incident lights passes through. The second birefringent mirror 1042 is also emitted to form a double image that is offset from each other. The light 14 will be decomposed into o-lights upon entering the first birefringent mirror 1041. For convenience of illustration, the o-light is indicated by a dashed line parallel to the incident ray 14. The infrared filter 1043 is usually a cobalt-containing blue glass and is coated on its outer surface to block infrared rays as an infrared cut filter. Most small cameras do not contain such devices as the infrared filter 1043, only high-order cameras. Only enough space and price considerations will match this type of infrared filter 1043. The low pass filter 104 in the first figure is only one of the forms, and a monolithic or multi-piece optical low pass filter.

Please refer to the second figure, which is a schematic diagram of the liquid crystal projection device 20. Liquid crystal projection The device 20 includes a light source assembly 201, a condensing mirror 202, a liquid crystal assembly 203, a color filter 204, quarter-wave polarizing plates 205, 207, birefringent crystals 206, 208, and a lens assembly 209. The light 210 emitted by the light source assembly 201 enters the condensing mirror 202. After the ray 210 passes through the condensing mirror 202, the originally scattered light 210 is concentrated in a fixed area, and the condensed light 211 enters the liquid crystal module 203. The liquid crystal unit 203 has a plurality of units. The pixels can control the brightness of each unit pixel by a control signal (not shown). The light ray 211 is controlled by the liquid crystal module 203 to enter the color filter 204. The color filter 204 controls the color represented by each unit pixel. The smaller the unit pixel is, the better the color and fineness it will appear.

When the light 211 passes through the color filter 204, it enters the 1/4 wavelength polarizing plate. In 205, the light is converted into polarized light 213. The polarized light 213 enters the birefringent crystal 206 such that the polarized light 213 forms a birefringent ray 214, which can be divided into o and c light that are staggered and parallel to each other, and the birefringent ray 214 can be re-entered into the other The /4 wavelength polarizing plate 207 is again converted into another polarized light 215, and then into another birefringent crystal 208 so that the polarized light 215 can be subdivided into another birefringent ray 216. The birefringence can be designed such that the optical path difference caused by the birefringent crystal 206 is equal to the distance of the unit pixels. Similarly, the optical path difference caused by the birefringent crystal 208 can be designed to be equal to the distance of the unit pixel, so that one unit pixel can be split into two or four units. Pixels make imaging more delicate. Finally, the birefringent ray 216 is projected onto the screen 218 via the lens assembly 209 to re-amplify the final image.

The above-mentioned prior art utilizes the birefringence characteristics of the birefringent crystals 206, 208. To improve the moiré, to eliminate the aliasing effect, and to use the polarization characteristics of the 1/4 wavelength polarizing plates 205, 207 to form polarized light or to filter the reflected light. However, as with the first birefringent mirror 1041 and the second birefringent mirror 1042 in the first figure, if it is to be thinned or miniaturized, it is not easy to put it into the imaging device, and it is hard to be placed outside the device. Not high enough to be damaged. It is to be improved to place the birefringent crystals 206, 208 and the 1/4 wavelength polarizing plates 205, 207 in a light, thin and short projection device. Therefore, there is a demand for a product that can combine the advantages of all of the above functions and can be used in a light and short imaging device or projection device.

In view of this, in the present invention, the birefringence characteristics of the sapphire crystal are utilized to design the product. Due to the birefringence properties of sapphire crystals, sapphire materials can be directly used as protective mirrors due to their excellent corrosion resistance, high compressive strength and hardness characteristics. By using the crystal birefringence characteristics and the optical design and coating, the functions of the protective mirror and the optical filter can be simultaneously combined to reduce the use of the polarizer, the filter, the protective mirror, and the like included in the optical lens assembly. Reduced size and reduced cost. In addition to utilizing the characteristics of the birefringence of sapphire crystals, the high hardness of the product can simultaneously take into account the functionality and reliability of the product.

The sapphire crystal is a birefringent crystal having a specific axial direction, which is suitable as a window glass. Since the sapphire crystal has a hexagonal crystal structure and different crystal axial directions, it can be used in the application to select different crystal axial directions and the crystal thickness design to obtain the desired effect, such as C-axis, A-axis, R-axis and M-axis are used as light windows. By using the characteristics of the birefringence of the sapphire crystal with the design of the crystal thickness and the combination of the photosensitive element or the projection source plus the image processing module, a better image result than the current technology can be obtained.

According to the above concept, an image taking device is proposed, which includes a lens module and a sapphire lens. The sapphire lens has a birefringence characteristic, is coupled to the lens module and serves as an incident light window to protect the lens module, and has a crystal structure and a crystal axial direction, and the crystal structure is a single crystal structure, and the crystal structure is The crystal axis is c-axis (0001), a-axis [including ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of them].

According to the above concept, an image taking device is proposed, the image capturing device comprising a mirror The head module and a rotatable protective light window. The rotatable protective light window is rotatably coupled to the lens module to protect the lens module, wherein the lens module is self-contained when the rotatable protective light window and the lens module are in a first relative position The outside world obtains a specific reflected light. When the rotatable protective light window and the lens module are in a second relative position, the lens module can block the specific reflected light from the outside.

According to the above concept, a projection device is proposed, the projection device comprising a light The source, a lens module, and a rotatable protective light window. The lens module is illuminated by the light source to generate a working light source. The rotatable protective light window has a birefringence characteristic coupled to the lens module, and serves as an exit light window to protect the lens module, and receives the working light source to generate a birefringent light.

According to the above concept, an image taking device is proposed, the image capturing device comprising a mirror The head module and a double refraction protection mirror. The birefringence protection mirror is coupled to the lens module to protect the lens module, receive an incident beam, and decompose the incident beam into a normal light and an abnormal light to improve the resolution of the image capturing device.

The invention uses sapphire as a light window and is placed at the outermost position, so that the sapphire has both The role of the protective window and the optical window, after the sapphire is imaged, the sapphire birefringence characteristics and excellent mechanical properties combined with the optical design make the final imaging effect more prominent than the current technology.

10, 30, 40, 50, 60‧‧‧ image capture device

101‧‧‧ optical lens

102‧‧‧Mirror

103‧‧‧Mirror shutter

104‧‧‧low-pass filter

105‧‧‧ CMOS image sensing components

106‧‧‧Image Processing Module

107‧‧‧LCD display

12, 31, 41, 51 ‧ ‧ objects

14,210‧‧‧Light

1041‧‧‧First Double Refractor

1042‧‧‧Second double refractor

1043‧‧‧Infrared filter

20‧‧‧Liquid projection device

201‧‧‧Light source components

202,7021‧‧ ‧Condenser

203‧‧‧Liquid crystal components

204‧‧‧Color filters

205, 207‧‧‧1/4 wavelength polarizer

206,208‧‧‧Birefringent crystal

209‧‧‧ lens components

211‧‧‧The light after the gathering

213, 215‧‧ ‧ polarized light

218‧‧‧ screen

214,216‧‧‧Birefringent light

301,401,601‧‧‧Sapphire lenses

302,402,502,702‧‧‧ lens module

35,36‧‧‧ parallel light

32, 42‧‧‧ incident light

33,43‧‧‧First refracted light

34,44‧‧‧second refracted light

3022,4022,5022,603‧‧‧Image sensing unit

3021, 4021, 5021, 602, 7024‧‧‧ optical lenses

303,404,504,605‧‧‧ flat panel display

3023, 403, 503, 604‧ ‧ image processing module

4011‧‧‧ first surface

4012‧‧‧ second surface

52‧‧‧Specific reflected light

501,703‧‧‧Rotary protective light window

606‧‧‧ring bracket

607‧‧‧Circular thread

70‧‧‧Projector

71‧‧‧Image

72‧‧‧Working light source

73‧‧‧Birefringent light

701‧‧‧Light source

7022‧‧‧Liquid layer

7023‧‧‧Color filter

First figure: Schematic diagram of a conventional high-order digital camera.

Second picture: Schematic diagram of a liquid crystal projection device.

Figure 3 is a schematic view of an image taking device of a first preferred embodiment of the present invention.

Fourth Figure: A schematic view of an image taking device of a second preferred embodiment of the present invention.

Figure 5 is a schematic view of an image taking device of a third preferred embodiment of the present invention.

Figure 6 is a schematic view showing an image taking device of a fourth preferred embodiment of the present invention.

Figure 7 is a schematic view of a projection apparatus according to a fifth preferred embodiment of the present invention.

Please refer to the third figure, which is a schematic diagram of the image capturing device 30 according to the first preferred embodiment of the present invention. The image capturing device 30 includes a sapphire lens 301 as a light window, a lens module 302, and a flat display 303. The sapphire lens 301 has a birefringence characteristic coupled to the lens module 302 and serving as an incident light window to protect the lens module 302. The sapphire lens 301 has a crystal structure and a crystal axial direction, the crystal structure is a single crystal structure, and the crystal axis is c-axis (0001), a-axis [including ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of them]. Since the sapphire material is harder than diamonds and has high mechanical strength, scratch resistance, and corrosion resistance, it is suitable as a protective lens for the image capturing device 30.

In the third figure, incident light 32 from object 31 is incident into sapphire lens 301. The sapphire lens 301 has two optical axis axes, wherein the crystal axial c-axis (0001) of the sapphire lens 32 is one of the two optical axis axes. In design, the two optical axes are not axially parallel to the direction in which incident light 32 is incident on the sapphire lens 301. When the incident light 32 is incident When the infeed direction is not parallel to the optical axes and enters the sapphire lens 301, the sapphire lens 301 emits a first refracted light 33 and a second refracted light 34 in response to the incident light 32. The two refracted lights 33, 34 are mutually Staggered and parallel to each other.

The lens module 302 includes an optical lens 3021, an image sensing unit 3022, and an image processing module 3023. The optical lens 3021 is coupled to the sapphire lens 301 and receives the first refracted light 33 and the second refracted light 34 to form two parallel lights 35, 36. The image sensing unit 3021 converts the two parallel lights 35, 36 into an electronic signal (not shown) to provide subsequent processing by the image processing module 3023.

The image processing module 3023 includes a circuit board (not shown) and a processor (not shown). The circuit board is electrically connected to the image sensing unit 3022. The processor is electrically connected to the circuit board, receives the electronic signal and converts it into an image signal. The flat display 303 is electrically connected to the circuit board, and outputs a display image to the flat display 303 in response to the image signal.

The sapphire lens 301 has the birefringence characteristic for eliminating one moiré and overlapping phenomenon, and can be disposed outside the lens module 302 and has the function of a protective mirror, so that the object of thinning and miniaturization can be achieved, for example, The sapphire lens 301 can be used as a protective mirror for a handheld device. A plurality of sapphire lenses 301 can also be used as a protective mirror. For example, an infrared filter or an ultraviolet filter can be used to filter unwanted light between two sapphire lenses 301.

Please refer to the fourth figure, which is a schematic diagram of the image taking device 40 according to the second preferred embodiment of the present invention. The image capturing device 40 includes a sapphire lens 401, a lens module 402, an image processing module 403, and a flat display 404. The sapphire lens 401 is coupled to the lens module 402 and serves as an incident light window to protect the lens module 402.

In the fourth figure, similar to the first preferred embodiment, from the object 41 The incident light 42 is incident into the sapphire lens 401. The sapphire lens 401 has two optical axis axes, wherein the crystal axial c-axis (0001) of the sapphire lens 42 is one of the two optical axis axes. In design, the two optical axes are not axially parallel to the direction in which incident light 42 is incident on the sapphire lens 401. When the incident direction of the incident light 42 is not parallel to the optical axis and enters the sapphire lens 401, the sapphire lens 401 emits a first refracted light 43 and a second refracted light 44 in response to the incident light 42. The refracted lights 43, 44 are staggered from each other and parallel to each other.

The lens module 402 includes an optical lens 4021 and an image sensing unit 4022. The optical lens 4021 is coupled to the sapphire lens 401 and receives the first refracted light 43 and the second refracted light 44 to form two parallel lights 45, 46. The image sensing unit 4021 converts the two parallel lights 45, 46 into an electronic signal (not shown) to provide subsequent processing by the image processing module 403.

The image processing module 403 includes a circuit board (not shown) and a processor (not shown). The circuit board is electrically connected to the image sensing unit 404. The processor is electrically connected to the circuit board, receives the electronic signal and converts it into an image signal. The flat display 404 is electrically connected to the circuit board, and outputs a display image to the flat display 404 in response to the image signal.

The sapphire lens 401 has a first surface 4011 and a second surface 4012. An anti-reflective coating layer may be plated on the first surface 4011. The material of the anti-reflective coating layer comprises a first semiconducting metal oxide such as ceria or titania. An infrared filter may be plated on the second surface 4012. The material of the infrared filter includes a second semiconducting metal oxide such as hafnium oxide, vanadium pentoxide or tantalum pentoxide.

In another preferred embodiment, the first surface 4011 may be coated with a multi-layer coating, for example, an anti-finger coating layer may be further coated on the anti-reflective coating layer, and the material of the anti-fingerprint coating layer may be, for example, A metal fluoride or a high molecular fluoride, which may be, for example, magnesium fluoride or calcium fluoride.

Please refer to FIG. 5, which is a schematic diagram of an image capturing apparatus 50 according to a third preferred embodiment of the present invention. The third preferred embodiment of the present invention improves the foregoing first and second preferred embodiments. The image capturing device 50 includes a rotatable protective light window 501, a lens module 502, an image processing module 503, and a flat display 504. The lens module 502 includes an optical lens 5021 and an image sensing unit 5022. In another preferred embodiment, the lens module 502 can include only one optical lens 5021. The image capturing device 50 further includes the image sensing unit 5022 coupled to the image processing module 503. The rotatable protection light window 501 is rotatably coupled to the lens module 502 to protect the lens module 502. When the rotatable protective light window 501 and the lens module 502 are in a first relative position, the lens module 502 can obtain a specific reflected light 52 from the outside. When the rotatable protective light window 501 and the lens module 502 are in a second relative position, the lens module 502 can block the specific reflected light 52 from the outside. The material of the rotatable protective window 501 is a sapphire, and can be used as a birefringent mirror, which can birefring the specific reflected light 52 from the object 51 to form o-light and e-light, respectively. The shape of the rotatable protective light window 501 can be a circular sheet shape. The specific reflected light 52 may be reflected light reflected by a light transmissive glass or reflected light reflected by a water surface.

The material of the rotatable protective window 501 is a sapphire, which can be made into a sapphire lens. As in the first and second embodiments of the present invention, the sapphire lens has a crystal structure and a crystal axial direction. The crystal structure is a single crystal structure, and the crystal axis is c-axis (0001), a-axis [including ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of them]. The sapphire lens has a first surface 5011 and a second surface 5012. The first surface 5011 can be coated with an anti-reflective coating layer, and the anti-reflective coating layer can be coated with an anti-finger coating layer. An infrared filter can be plated on the two surfaces 5012.

The third preferred embodiment of the present invention uses a rotation to change the object from the object The direction of refraction of the reflected light 52 is such that the rotatable protective window 501 can also achieve the effect of a polarizer. The third preferred embodiment combs the original messy light into directional polarized light by the rotatable protective light window 501, so that the irregular light can be filtered, and the rotatable protective light window 501 is simultaneously There is an effect such as a polarizer.

Please refer to a sixth figure, which is an imaging device 60 of a fourth preferred embodiment of the present invention. schematic diagram. The image capturing device 60 includes a sapphire lens 601, an optical lens 602, an image sensing unit 603, an image processing module 604, and a flat display 605. The sapphire lens 601 can be designed to be detachable and have a rotatable structure. The sapphire lens 601 placed in front of the optical lens 602 can be rotated to an appropriate relative angle before the photographing. The sapphire lens 601 can be automatically rotated by manual adjustment or by using a motor (not shown) to drive the sapphire lens 601. As shown in FIG. 6 , one of the assembly methods of the sapphire lens 601 , the image capturing device 60 further includes a ring-shaped bracket 606 , the sapphire lens 601 is mounted on the ring-shaped bracket 606 . A space is reserved in the ring-shaped bracket 606 to rotate the sapphire lens 601. An annular thread 607 is disposed outside the ring-shaped bracket 606 to manually screw the ring-shaped bracket 606 into the image capturing device 60 and fixed to the image capturing device 60. on.

Please refer to the seventh figure, which is a schematic diagram of a projection apparatus 70 according to a fifth preferred embodiment of the present invention. The projection device 70 includes a light source 701, a lens module 702, and a rotatable protective light window 703. The lens module 702 is illuminated by the light source 701 to generate a working light source 72. The rotatable protective light window 703 has a birefringence characteristic, is coupled to the lens module 702, and serves as an exit light window to protect the lens module 702, and receives the working light source 72 to generate a birefringent light 73. The lens module 702 includes a condensing mirror 7021, a liquid crystal layer 7022, a color filter 7023, and an optical lens 7024.

The projection device can be a digital light processing (DLP) A projection device, a liquid crystal on silicon (LCoS) projection device, or a liquid crystal display (LCD) projection device.

As in the foregoing embodiment of the present invention, the rotatable protective optical window 703 can be a sapphire optical window having a crystal structure and a crystal axial direction, the crystal structure being a single crystal structure, and the crystal axis is c - axial (0001), a-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of them].

The projection device 70 further includes an automatic rotating structure (not shown), the automatic rotation The swivel structure causes the rotatable protective light window 703 to automatically rotate. The projection device 70 projects an image 71 having a frame rate. When the rotatable protective window is rotated 703, it has a rotational frequency that depends on the frame rate. Preferably, the rotation frequency is greater than or equal to the picture rate. When the image 71 projected by the projection device 70 is stationary, the rotation frequency may be zero, that is, the rotation is stopped. Since the rotatable protective light window 703 is a sapphire light window, its birefringence characteristic can be used to increase a resolution of the image 71.

Example

An image capture device comprising a lens module and a sapphire lens. The sapphire lens has a birefringence characteristic, is coupled to the lens module and serves as an incident light window to protect the lens module, and has a crystal structure and a crystal axial direction, and the crystal structure is a single crystal structure, and the crystal structure is The crystal axis is c-axis (0001), a-axis [including ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of them].

2. The device of embodiment 1, wherein the sapphire lens has two lights In the axial direction, when an incident direction of incident light is not parallel to any of the optical axis axes and enters the sapphire lens, the sapphire lens emits a first refracted light and a second refracted light in response to the incident light. The c-axis (0001) is one of the two optical axis axes. The birefringence characteristic of the sapphire lens serves to eliminate one moiré. The lens module includes an optical lens, an image sensing unit, and an image processing module. The optical lens is coupled to the sapphire lens and receives the first refracted light and the second refracted light to form two parallel lights. The image sensing unit converts the two parallel lights into an electronic signal. The image processing module includes a circuit board and a processor. The circuit board is electrically connected to the image sensing unit, and the processor is electrically connected to the circuit board, receives the electronic signal and converts the image into an image signal. The image capturing device further includes a flat panel display electrically connected to the circuit board and outputting a display image in response to the image signal.

3. An image capturing device comprising a lens module and a rotatable protection light window. The rotatable protective light window is rotatably coupled to the lens module to protect the lens module, wherein the lens module is self-contained when the rotatable protective light window and the lens module are in a first relative position The outside world obtains a specific reflected light. When the rotatable protective light window and the lens module are in a second relative position, the lens module can block the specific reflected light from the outside.

4. The device of embodiment 3, wherein the rotatable protective light window has a crystal structure and a crystal axial direction, the crystal structure is a single crystal structure, and the crystal axis is c-axis (0001) , a-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of them]. The rotatable protective window serves as a birefringent mirror that causes birefringence of the specific reflected light to form an ordinary light and an extraordinary light, respectively. The rotatable protective light window is a sapphire lens having a first surface and a second surface. The image capturing device further comprises an anti-reflection coating layer and an infrared filter. The anti-reflective coating layer is formed on the first surface, and the material of the anti-reflective coating layer comprises a first semiconducting metal oxide, and the first semiconducting metal oxide comprises ceria or titania. The infrared filter is formed on the second surface, and the material of the infrared filter comprises a second semiconducting metal oxide, and the second semiconducting metal oxide comprises ceria, vanadium pentoxide or tantalum pentoxide. The lens module includes a stepping motor that drives the rotatable protective light window to rotate to block the specific reflected light or pass the specific reflected light through the rotatable protective light window.

5. A projection device comprising a light source, a lens module, and a spin Turn to protect the light window. The lens module is illuminated by the light source to generate a working light source. The rotatable protective light window has a birefringence characteristic coupled to the lens module, and serves as an exit light window to protect the lens module, and receives the working light source to generate a birefringent light.

6. The device of embodiment 5, wherein the rotatable protective light window has a crystal structure and a crystal axial direction, the crystal structure is a single crystal structure, and the crystal axis is c-axis (0001) , a-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of them]. The lens module comprises a concentrating mirror, a liquid crystal layer, a color filter, and an optical lens. The projection device is a digital light processing (DLP) projection device, a liquid crystal on silicon (LCoS) projection device, or a liquid crystal display (LCD) projection device.

7. The device of 5-6, wherein the projection device further comprises an automatic rotation The structure, the automatic rotating structure causes the rotatable protective light window to automatically rotate. The projection device projects an image having a frame rate, and when the rotatable protective window is rotated, it has a rotation frequency that depends on the frame rate. The rotation frequency is greater than or equal to the picture rate. The birefringence characteristic of the rotatable protective light window is used to increase a solution of the image Degree of analysis.

8. An image capture device comprising a lens module and a birefringence protection mirror. The birefringence protection mirror is coupled to the lens module to protect the lens module, receive an incident beam, and decompose the incident beam into a normal light and an abnormal light to improve the resolution of the image capturing device.

9. The device of embodiment 8, wherein the birefringent mirror has a crystal structure and a crystal axial direction, the crystal structure is a single crystal structure, and the crystal axis is c-axis (0001), a - axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of them]. The birefringent mirror has a birefringence characteristic to avoid an aliasing phenomenon. The birefringent mirror acts as an incident light window. The birefringent mirror is a sapphire lens having a first surface and a second surface. The image capturing device further comprises an anti-reflection coating layer, an anti-fingerprint coating layer, and an infrared filter. The anti-reflective coating layer is formed on the first surface, and the material of the anti-reflective coating layer comprises a first semiconducting metal oxide, and the first semiconducting metal oxide comprises ceria or titania. The anti-fingerprint coating layer is formed on the anti-reflective coating layer, and the material of the anti-fingerprint coating layer comprises a metal fluoride or a polymer fluoride, and the metal fluoride comprises magnesium fluoride or calcium fluoride. The infrared filter is formed on the second surface, the material of the infrared filter mirror comprises a second semiconducting metal oxide comprising ceria, vanadium pentoxide or tantalum pentoxide .

10. The device of any of embodiments 8-9, wherein the birefringent mirror is a sapphire lens having two optical axis axes, when an incident direction of incident light is not axial with respect to the optical axes Upon entering the sapphire lens in parallel, the sapphire lens emits a first refracted light and a second refracted light in response to the incident light. The lens module includes an optical lens and an image sensing unit. The optical lens is coupled to the sapphire lens and receives the first refracted light and The second refracted light forms two parallel lights. The image sensing unit converts the two parallel lights into an electronic signal. The image capturing device further comprises an image processing module and a flat display. The image processing module includes a circuit board and a processor. The circuit board is electrically connected to the image sensing unit, and the processor is electrically connected to the circuit board, receives the electronic signal and converts the image into an image signal. The flat panel display is electrically connected to the circuit board and outputs a display image in response to the image signal.

In the above, the description and the embodiments of the present invention have been disclosed, and are not intended to limit the present invention, and those skilled in the art can make various changes without departing from the spirit and scope of the present invention. And modifications, which still fall within the scope of the present invention.

30‧‧‧Image capture device

301‧‧‧Sapphire lenses

35,36‧‧‧ parallel light

33‧‧‧First refracted light

3022‧‧‧Image sensing unit

303‧‧‧ flat panel display

70‧‧‧Projector

72‧‧‧Working light source

701‧‧‧Light source

7023‧‧‧Color filter

7021‧‧‧Condenser

31‧‧‧ objects

302,702‧‧‧ lens module

32‧‧‧ incident light

34‧‧‧second refracted light

3021,7024‧‧‧Optical lenses

3023‧‧‧Image Processing Module

703‧‧‧Rotary protection light window

71‧‧‧Image

73‧‧‧Birefringent light

7022‧‧‧Liquid layer

Claims (10)

An image capturing device comprising: a lens module; and a sapphire lens having a birefringence characteristic coupled to the lens module and serving as an incident light window to protect the lens module, and having a crystal structure and a crystal In the axial direction, the crystal structure is a single crystal structure, and the crystal axis is c-axis (0001), a-axis [including ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of the filters; and at least one filter disposed on one of the sides of the sapphire lens, wherein the choice of the axial direction of the crystal is based on the need for the direction of refraction of the sapphire lens. The device of claim 1, wherein: the at least one filter comprises at least one infrared filter and an ultraviolet filter; the sapphire lens has two optical axis axes, when an incident light does not travel in a direction When entering the sapphire lens in parallel with any of the optical axis axes, the sapphire lens emits a first refracted light and a second refracted light in response to the incident light; the c-axis (0001) is the two One of the axial axes of the optical axis; the birefringence characteristic of the sapphire lens is used to eliminate a moiré; the lens module includes: an optical lens coupled to the sapphire lens and receiving the first refracted light and the The second refracted light forms two parallel lights; an image sensing unit converts the two parallel lights into an electronic signal; and an image processing module includes: a circuit board electrically connected to the image sensing unit; and a processor electrically connected to the circuit board to receive the electronic signal and convert the image into an image signal; and the image capturing device further comprises: a flat display, the electric Connected to the circuit board and output a display image in response to the image signal. An image capturing device comprising: a lens module; and a rotatable protection light window rotatably coupled to the lens module to protect the lens module, wherein: the rotatable protection light window and the lens module When the group is in a first relative position, the lens module can obtain a specific reflected light from the outside; when the rotatable protection light window and the lens module are in a second relative position, the lens module can block from the outside The particular reflected light, wherein the rotatable protective light window rotates to change the direction of refraction of the particular reflected light. The device of claim 3, wherein: the rotatable protective optical window has a crystal structure and a crystal axial direction, the crystal structure is a single crystal structure, and the crystal axis is c-axis ( 0001), a-axis [included ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of the crystal axes is selected according to the direction of refraction of the reflected light; the rotatable protective light window acts as a birefringent mirror, which can cause birefringence of the specific reflected light to form separately An ordinary light and an extraordinary light; the rotatable protective light window is a sapphire lens having a first surface and a second surface; the image capturing device further comprises: at least one anti-reflective coating layer Formed on the first surface, the material of the at least one anti-reflective coating layer comprises a first semiconducting metal oxide; and an infrared filter, the at least one anti-reflective coating layer or the infrared filter is formed in the second The surface of the infrared filter comprises a second semiconducting metal oxide; the first semiconducting metal oxide comprises ceria or titania; and the second semiconducting metal oxide comprises ceria, vanadium pentoxide, or Bismuth pentoxide; and the lens module includes: a stepping motor that drives the rotatable protective window to rotate to block the specific reflected light or to cause the specific reflected light The rotatably protected light window is passed through. A projection device comprising: a light source; a lens module illuminated by the light source to generate a working light source; and a rotatable protective light window having birefringence characteristics coupled to the lens module as an outgoing light window To protect the lens module and receive the working light source to generate a birefringent light. The device of claim 5, wherein: the rotatable protective optical window has a crystal structure and a crystal axial direction, the crystal structure is a single crystal structure, and the crystal axis is c-axial ( 0001), a-axis [included ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of the lenses; the lens module comprises a concentrating mirror, a liquid crystal layer, a color filter, and an optical lens; and the projection device is a digital light processing (DLP) projection device, a liquid crystal A Liquid Crystal On Silicon (LCoS) projection device or a liquid crystal display (LCD) projection device. The device of claim 5, wherein the projection device further comprises an automatic rotation structure that automatically rotates the rotatable protection window; the projection device projects an image having a picture a frame rate, when the rotatable protection window is rotated, having a rotation frequency that depends on the picture rate; the rotation frequency is greater than or equal to the picture rate; and the rotatable protection window The birefringence characteristic is used to increase the resolution of the image. An image capturing device comprises: a lens module; and a birefringence protection mirror coupled to the lens module to protect the lens module, receive an incident beam and decompose the incident beam into a normal light and an abnormal light To improve the image loading The resolution is set, wherein the birefringence mirror rotates to change the angle of refraction of the incident beam. The device of claim 8, wherein the birefringence mirror has a crystal structure and a crystal axial direction, the crystal structure is a single crystal structure, and the crystal axis is c-axis (0001) , a-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], m-axial [including ( ), ( ), ( ), ( ), ( ),as well as( )], and r-axial [including ( ), ( ), ( ), ( ), ( ),as well as( One of the crystal axes is selected according to the angle of refraction of the incident beam; the birefringence mirror has a birefringence characteristic to avoid an aliasing phenomenon; The refractor mirror is an incident light window; the birefringent mirror is a sapphire lens having a first surface and a second surface; the image capturing device further comprises: an anti-reflective coating layer formed on the first surface The material of the anti-reflective coating layer comprises a first semiconductor metal oxide; an anti-fingerprint coating layer is formed on the anti-reflective coating layer, and the material of the anti-fingerprint coating layer comprises a metal fluoride or a polymer fluorine. And an infrared filter formed on the second surface, the material of the infrared filter mirror comprises a second semiconducting metal oxide; the first semiconducting metal oxide comprises ceria or titania; the second semiconductor The metal oxide includes cerium oxide, vanadium pentoxide, or antimony pentoxide; and the metal fluoride includes magnesium fluoride or calcium fluoride. The device of claim 8, wherein the birefringent mirror is a sapphire lens having two optical axis axial directions, when an incident direction of the incident light is not axial with respect to the optical axes When the sapphire lens enters the sapphire lens in parallel, the sapphire lens emits a first refracted light and a second refracted light in response to the incident light; the lens module includes: an optical lens coupled to the sapphire lens and receiving the sapphire lens The first refracted light and the second refracted light form two parallel lights; and an image sensing unit converts the two parallel lights into an electronic signal; the image capturing device further comprises: an image processing module, comprising: a circuit a board electrically connected to the image sensing unit; and a processor electrically connected to the circuit board to receive the electronic signal and convert the image into an image signal; and a flat display electrically connected to the circuit board and responsive to the The image signal outputs a display image.