TWM567860U - Optical testing device - Google Patents

Abstract

An optical testing device is used for testing an optical device to be measured. A telescopic image module is disposed on a track of the optical testing device, and a displacement mechanism of the optical testing device is adapted to place the at least one image sensor and the target in a first optical relative position or a second optical relative position. In the first optical relative position, the at least one image sensor can receive the light from the optical device to be measured, so that the image sensor receives the light and captures an image. In the second optical relative position, the at least one image sensor cannot receive the light from the optical device to be measured.

Description

Optical detection device

An optical detecting device, in particular, relates to an optical detecting device which has the characteristics of small viewing angle measurement limit to meet the test conditions required by different lens or image modules.

Different optical products are different in application, so they also need to provide a similar and corresponding test conditions in the detection, such as FOV (Field of View) and object distance, how to provide different space distances in a limited space. Architectures such as viewing angles are important. For example, the distance between a general camera lens, a monitor or a telescope is several meters or kilometers, and the viewing angle may be from 2 degrees to 165 degrees or even larger.

Figure 1 shows a schematic diagram of an optical analog device of the prior art that shortens the object distance. Fig. 1 is a technique for shortening the object distance disclosed in Taiwan Publication No. 201409007. Referring to FIG. 1 , an optical simulation device 3 capable of shortening the object distance is used to project an image of a test screen 2 onto the lens 1 to be tested placed at the exit position of the optical simulation device 3, and a shorter object distance can be used. u, the lens 1 to be tested is captured to a larger virtual screen 2'. According to the conventional technique of FIG. 1, the actual distance can be shortened by using a relay lens (Relay Lens) for a far object distance, but the similar structure is for a wide angle or a fisheye lens or an image module. In other words, the design and production of relay lenses are quite difficult.

Taiwan Patent No. I282900 discloses another technique for shortening the optical path of an optical path, which incorporates an equivalent lens and simulates the distance between the mirrors to produce a desired object distance, which is equivalent to the same in wide-angle or fisheye lens testing. The design and manufacture of lenses is equally difficult.

Figure 2 shows a schematic view of a conventional lens detecting device for detecting a lens. The technique of Figure 2 is an infinite-finite conjugate system. As shown in FIG. 2, the lens detecting device 100 includes a target 110, a light source 120, a lens to be tested 130, a plurality of telescope heads and an image module 140, and a curved track 150. The light of the light source 120 penetrates the target 110, and the target 110 is engraved with a pattern to be analyzed, and then the light is projected to the telephoto image module 140 via the lens 130 to be tested. The telephoto image module 140 includes a telescope head 141 and an image sensor 142. The telescope head 141 provides an infinite object distance, and the image sensor 142 takes an image containing the pattern of the target 110 and uses a computer and software calculation (not shown) to determine the image quality. In the lens detecting device 100 shown in FIG. 2, a plurality of sets of telephoto image modules 140 can be installed to simultaneously measure image quality of different field of view (FOV), and the telephoto image module 140 can also be used according to requirements. The image quality of another different viewing angle can be measured along the curved surface of the curved track 150. The advantage of this architecture is that there are fewer restrictions on the wide-angle lens. However, according to conventional techniques, there is still room for improvement.

An object of an embodiment of the present invention is to provide an optical detecting device for detecting An optical device to be tested and characterized by a small viewing angle measurement limit.

According to an embodiment of the invention, an optical detection device includes a target, a track, a light source, at least one telephoto image module, at least one image sensor, and a displacement mechanism. The light source is used to form a light that is adapted to illuminate the optical device to be tested after penetrating the target. The at least one telephoto image module is placed on the track, and the at least one telephoto image module is adapted to form an infinity object distance. The displacement mechanism is adapted to enable the at least one image sensor and the target to be located at a relative position of the first optical path or a relative position of the second optical path, and the at least one image sensor can receive the received image when the first optical path is opposite to the position The light of the optical device is measured; and when the second optical path is in a relative position, the at least one image sensor is capable of not receiving light from the optical device to be tested.

In one embodiment, the track is a curved track, the number of the at least one telephoto module is a majority, and the number of the at least one image sensor is a majority.

In one embodiment, the middle portion of the curved track assumes a hollow state for the light to pass through. The displacement mechanism is connected to the first telephoto image module of the telephoto image module, and is configured to move the first telephoto image module, so that the image sensors and the target are located at a relative position of the first optical path or the second optical path is opposite. position.

In an embodiment, when the second optical path is in a relative position, the first telephoto image module is located at a middle portion of the curved track so that the target does not face the image sensors; and when the first optical path is in a relative position, The first telephoto image module is not located in the middle portion of the curved track, so that the target faces the shadows Like a sensor.

In an embodiment, the optical detecting device further includes a relay lens, and the relay lens is located at the middle portion of the curved track, and is adapted to pass the light through the relay lens to enter the image sense Detector.

In one embodiment, the curved track comprises a continuous curved surface. The displacement mechanism includes a displacement platform and a fixing base. The fixing base is configured to support the target, the optical device to be tested and the light source, and movably set the displacement platform, so that the image sensors and the target are located at a relative position of the first optical path or the second optical path is opposite position.

In an embodiment, when the first optical path is in a relative position, the fixing seat is located outside the curved track, and the target faces the image sensors; and when the second optical path is in a relative position, the The target faces a first telephoto module of the telephoto module.

According to an embodiment of the present invention, an optical detecting device for detecting an optical device to be tested includes a target, a light source, and a plurality of image sensors. The image sensors are adapted to receive the light from the optical device to be tested. In an embodiment, the optical detecting device further includes a relay lens. The relay lens is disposed in front of the image sensors, and is adapted to pass light through the relay lens before entering the image sensors. Moreover, the optical detecting device does not include a plurality of telephoto image modules and a curved track for setting the telephoto image modules.

In one embodiment, the optical detecting device further includes a relay lens, and the relay lens is located outside the curved track and disposed in front of the image sensors, and is adapted to pass the light through the middle After the lens, enter the image sensors.

1‧‧‧Densor to be tested

2‧‧‧Test screen

3‧‧‧Optical simulation device

100‧‧‧Lens detection device

110‧‧‧ Target

120‧‧‧Light source

130‧‧‧Densor to be tested

140‧‧‧ Telephoto Module

141‧‧‧ telescope head

142‧‧‧Image Sensor

150‧‧‧ curved track

200‧‧‧ optical inspection device

200a‧‧‧Optical inspection device

200b‧‧‧Optical inspection device

210‧‧‧ Target

220‧‧‧Light source

230‧‧‧Densor to be tested

240‧‧‧ Telephoto Module

240a‧‧‧ Telephoto Module

241‧‧‧ telescope head

242‧‧‧Image Sensor

245‧‧‧Image sensor

250‧‧‧ curved track

251‧‧‧First track

252‧‧‧second track

260‧‧‧Relay lens

270‧‧‧displacement mechanism

271‧‧‧ Displacement platform

272‧‧‧ fixed seat

273‧‧‧Extension arm

274‧‧‧Reflective components

275‧‧‧ support

280‧‧‧ computer

1 shows a schematic diagram of a lens and image module detecting device of the prior art.

2 shows a schematic diagram of another conventional lens and image module detecting device.

Fig. 3 is a schematic view showing an optical detecting device of an embodiment of the present invention.

4 is a schematic diagram showing a state of use of the lens and image module detecting device of the prior art of FIG. 2.

Fig. 5 is a schematic view showing an optical detecting device of another embodiment of the present invention.

Figure 6 is a schematic view showing an optical detecting device of another embodiment of the present invention.

Fig. 7 is a view showing an optical detecting device of another embodiment of the present invention.

Fig. 3 is a schematic view showing an optical detecting device of an embodiment of the present invention. As shown in FIG. 3, the optical detecting device 200 is configured to detect an optical device 230 to be tested, and includes a target 210, a light source 220, a plurality of telephoto image modules 240, a plurality of image sensors 245, and a curved surface. Track 250 and a displacement mechanism 270. Preferably, a computer 280 is included. The light of the light source 220 penetrates the target 210, and the target 210 is engraved with a pattern to be analyzed, and then the light is projected through the optical device 230 to be measured to a telephoto. Image module 240. The telephoto image module 240 can form an infinity object distance and capture an image. More specifically, the telephoto image module 240 includes a telescope head 241 and an image sensor 242. The telescope head 241 provides an infinity object distance, and the image sensor 242 captures an image containing the pattern of the target 210 and calculates the image using the computer 280 storing the software calculation to obtain the image quality.

The displacement mechanism 270 is adapted to position the image sensors 245 and the target 210 at a relative position of the first optical path or a relative position of the second optical path. The image sensors 245 are capable of receiving light from the optical device 230 to be tested when the first optical path is in a relative position; and the image sensors 245 are not receiving the optical device 230 from the optical device to be tested 230 when the second optical path is in a relative position. The light. In this embodiment, when the first optical path is in the relative position, the target 210 faces the image sensors 245 to receive the light and capture an image; and when the second optical path is in the opposite position, the target 210 does not face the These image sensors 245.

As shown in FIG. 3, the middle portion of the curved track 250 is in a hollow state. When the image sensors 245 and the target 210 are located at a relative position of the first optical path, the light of the light source 220 passes, and finally enters the These image sensors 245. More specifically, the curved track 250 includes a first track 251 and a second track 252. The first track 251 and the second track 252 are spaced apart by a predetermined distance such that the middle portion of the curved track 250 is in a hollow state. Light from the light source 220 is passed through and finally to the image sensors 245. According to the prior art, when the viewing angle is smaller than a specific specification, it is impossible to measure, but according to the foregoing design, even if the viewing angle is smaller than a specific specification, measurement can be performed.

4 is a schematic diagram showing a state of use of the lens and image module detecting device of the prior art of FIG. 2. As shown in FIG. 4, according to the conventional technique of FIG. 2, a plurality of telephoto image modules 140 are placed on the arc track. When the middle portion of the track 250 is used to measure the optical properties of the central portion of the optical device 230 to be tested, only the angle of view larger than a specific specification can be measured due to the mechanism interference between the telephoto image modules 140. A disadvantage of the prior art is that it cannot be measured when the viewing angle is smaller than a specific specification.

In contrast, according to the embodiment, since the middle portion of the curved track 250 is in a hollow state, when the image sensors 245 and the target 210 are located at a relative position of the first optical path, the light of the light source 220 is passed. The image sensors 245 are further moved into the image sensors 245. Since the volume of the image sensors 245 is small, the mechanism interference between the two is small, and even a small angle of view can be measured.

Further, according to the foregoing embodiment, the intermediate portion of the curved track 250 is in a hollow state, and there is a problem that the intermediate portion cannot be measured by the telephoto image module 240. In this embodiment, in one embodiment, the displacement mechanism 270 is coupled to a telephoto image module 240a located in the middle of the arc track 250 in the telephoto image module 240, and the displacement mechanism 270 is configured to move the telephoto image module. 240a, the telephoto image module 240a is selectively located in the middle portion of the curved track 250 and not in the intermediate portion. More specifically, in the relative position of the second optical path, the telephoto image module 240a is located in the middle portion of the curved track 250 so that the target 210 does not face the image sensors 245; and when the first optical path is in the relative position The telephoto image module 240a is not located in the middle portion of the curved track 250, so that the target 210 faces the image sensors 245. More specifically, the displacement mechanism 270 includes an extension arm 273 that connects and secures the telephoto image module 240a to selectively move the telephoto image module 240a to the middle of the curved track 250. Unlike conventional techniques, the present embodiment utilizes a manual or electric motor or similar displacement mechanism 270 to displace the central telephoto image module 240a, preferably to an effective optical path that does not obscure a smaller viewing angle, and is smaller. The detection of the angle of view is changed to match the image with the actual object distance. Sensing for correlated optical quality detection.

In the present invention, the optical device 230 to be tested may be a to-be-tested lens or a to-be-tested image module. The lens and image module can be, for example, a camera lens, a monitor, or a telescope. Further, the displacement mechanism 270 can be a manual displacement mechanism or a displacement mechanism including an electric motor.

Fig. 5 is a schematic view showing an optical detecting device of another embodiment of the present invention. The embodiment of Fig. 5 is similar to the embodiment of Fig. 3, and therefore the same elements are denoted by the same reference numerals, and the related description will be omitted, and only the at least one difference will be described below. As shown in FIG. 5, the optical detecting device 200a of the present embodiment further includes a relay lens 260. The relay lens 260 is located at an intermediate portion of the curved track 250, and is adapted to pass the light of the light source 220 through the interior of the relay lens 260. And then enter the image sensors 245. The relay lens 260 can adjust the size of the object distance. Therefore, according to the embodiment, when the small viewing angle is far away, the size of the object distance can be adjusted by the relay lens 260 to achieve the effect of reducing the volume of the detecting device. According to the present embodiment, a relay lens 260 is added at the center of the optical detecting device 200a for testing a small viewing angle and shortening the object distance. Since the distance from the image sensor 245 to the relay lens 260 is adjustable, it is possible to simulate different object distance conditions and the like.

Figure 6 is a schematic view showing an optical detecting device of another embodiment of the present invention. As shown in FIG. 6, the optical detecting device 200b can also be designed as a two-phase connected structure, and the displacement mechanism 270 or the mobile platform 271 can selectively control which structure the optical device 230 to be tested is tested or the like.

More specifically, as shown in FIG. 6, the optical detecting device 200b includes a target 210 and a light source. 220, an optical device 230 to be tested, a plurality of telephoto image modules 240, a plurality of image sensors 245, a curved track 250, and a displacement mechanism 270. The curved track 250 is a continuous curved surface, and a telephoto module 240a can be disposed at a central position thereof. The displacement mechanism 270 includes a displacement platform 271 and a fixing base 272. The target 210, the optical device 230 to be tested, and the light source 220 are fixed to the fixing base 272. The mount 272 is movably disposed on the displacement platform 271 such that the mount 272 can be selectively located outside of the curved track 250 or inside the curved track 250. When the fixing base 272 is inside the curved track 250, the image sensors 245 and the target 210 are located at opposite positions of the second optical path, and the target 210 does not face the image sensors 245, and the curved surface track 250 can be utilized. The telephoto image module 240a at the center performs optical measurement. When the fixing base 272 is outside the curved track 250, the image sensors 245 and the target 210 are located at opposite positions of the first optical path, and the target 210 faces the image sensors 245, so that the light of the light source 220 passes through the standard. After the target 210, the image sensors 245 can be re-entered.

In one embodiment, the optical detecting device 200b may further include a relay lens 260. The relay lens 260 is disposed in front of the image sensors 245. More specifically, the fixing base 272 is outside the curved track 250. The relay lens 260 is located between the optical device 230 to be tested and the image sensors 245. The relay lens 260 can adjust the size of the object distance, and thus the relay lens 260 can adjust the size of the object distance to achieve the effect of reducing the volume of the detecting device. In one embodiment, the image sensors 245 are close to or adjacent to each other, thereby enabling optical detection for small viewing angles. In an embodiment, the optical detecting device can also include a target 210, a light source 220, and a plurality of image sensors 245. Preferably, the optical detecting device further includes a relay lens 260, and the foregoing test structure can be used independently. It is an independent detection device. More specifically, it may not include a telephoto image module 240 and a curved track 250 for setting the telephoto image module 240.

Fig. 7 is a view showing an optical detecting device of another embodiment of the present invention. As shown in FIG. 7, the optical detecting device 200c includes a target 210, a light source 220, an optical device 230 to be tested, a plurality of telephoto image modules 240, a plurality of image sensors 245, a curved track 250, and a Displacement mechanism 270. The curved track 250 is a continuous curved surface, and a telephoto module 240a can be disposed at a central position thereof. The displacement mechanism 270 includes a reflective element 274 and a support base 275. The support 275 supports the reflective element 274, and selectively places the reflective element 274 in front of the optical device 230 to be tested, thereby changing the path of the light, so that the image sensor 245 and the target 210 are selectively located on the first optical path. Relative position or relative position of the second optical path. When the image sensor 245 and the target 210 are located at the opposite positions of the second optical path, the reflective element 274 does not change the light path, but can be optically measured by the telephoto image module 240a located at the center of the curved track 250. When the image sensor 245 and the target 210 are located at the opposite positions of the first optical path, the light path is changed by the reflective element 274, so that the light of the light source 220 passes through the target 210 and the optical device 230 to be tested, and the light is changed by the reflective element 274. The path can be re-entered into the image sensors 245.

It should be understood that the optical optical path is reversible, so that in addition to the architecture of the foregoing embodiments (known as reverse casting), a front projection structure can also be used, that is, the relative positions of the light source 210, the target 220, and the image sensor 230 are interchanged. Since the relative position of the optical path is similar, it is also established. In this positive projection structure, a module including an image sensor such as a camera can be tested in addition to the lens.

Claims (11)

An optical detecting device for detecting an optical device to be tested, comprising a target; a track; a light source for forming a light, the light being adapted to penetrate the target and illuminating the optical device to be tested; at least one The telephoto image module is disposed on the track, and the at least one telephoto image module is adapted to form an infinity object distance, and is adapted to receive the light from the optical device to be tested; at least one image sensor is adapted to Receiving the light from the optical device to be tested; and a displacement mechanism adapted to position the at least one image sensor and the target at a first optical path relative position or a second optical path relative position at the first optical path The at least one image sensor is capable of receiving the light from the optical device to be tested in a relative position; and the at least one image sensor does not receive the optical device from the optical device to be tested when the second optical path is in a relative position Light. The optical detecting device of claim 1, wherein the track is a curved track, the number of the at least one telephoto image module is a plurality, and the number of the at least one image sensor is a majority. The optical detecting device of claim 2, wherein the middle portion of the curved track is in a hollow state for passing the light, and the displacement mechanism is connected to a first telephoto image module of the telephoto module. For moving the first telephoto image module, the image sensors and the target are located in the first light The relative position of the road or the relative position of the second optical path. The optical detecting device of claim 3, wherein, when the second optical path is in a relative position, the first telephoto image module is located at the middle portion of the curved track, so that the target does not face the image sense And the first telephoto image module is not located in the middle portion of the curved track, so that the target faces the image sensors. The optical detecting device according to any one of claims 1 to 4, further comprising a relay lens, wherein the relay lens is located at the intermediate portion of the curved track, and is adapted to pass the light through the relay lens Then enter the image sensors. The optical detecting device of claim 2, wherein the curved track comprises a continuous curved surface, the displacement mechanism comprises: a displacement platform; and a fixing base for supporting the target, the optical device to be tested and The light source is configured to movably set the displacement platform such that the image sensors and the target are located at a relative position of the first optical path or a relative position of the second optical path. The optical detecting device of claim 6, wherein, in the relative position of the first optical path, the fixing seat is located outside the curved track, and the target is facing the image sensors; When the two optical paths are in opposite positions, the fixing seat is located inside the curved track, so that the target faces a first telephoto image module of the telephoto image modules. The optical detecting device of claim 2, wherein the curved track comprises a continuous curved surface, the displacement mechanism comprising: a reflective element; and a support base supporting the reflective element and selectively moving the reflective element to change a path of light from the optical device to be tested, such that the image sensor and the target are selectively Located at a relative position of the first optical path or a relative position of the second optical path. The optical detecting device according to any one of claims 6 to 8, further comprising a relay lens, wherein the relay lens is located outside the curved track and disposed in front of the image sensors, It is suitable for the light to pass through the relay lens and then to the image sensors. An optical detecting device for detecting an optical device to be tested, comprising a target; a light source for forming a light, the light being adapted to penetrate the target and illuminating the optical device to be tested; and a plurality of image senses a detector adapted to receive the light from the optical device to be tested. The optical detecting device of claim 10, further comprising: a relay lens disposed in front of the image sensors, adapted to pass the light through the relay lens, and then to the image sensing And the optical detecting device does not include a plurality of telephoto image modules and a curved track for setting the telephoto image modules.