TW202132755A - Optical testing device - Google Patents

Abstract

An optical testing device is used to detect a first optical device to be tested whose optical path is non-linear. The optical testing device includes a target, a light source and an image sensing module. The light source is used to form a light beam, which is suitable for illuminating the first optical device to be tested after penetrating the target. The image sensing module is configured to receive the light beam from the first optical device, and is used to capture an image including a pattern of the target. The target is disposed at a position where the light from the light source cannot directly enter the image sensing module after passing through the target, but can enter the image sensing module after passing through the first optical device.

Description

Optical detection device

An optical detection device, in particular, an optical detection device, which can meet the test conditions required by different lenses or image modules.

Different optical products have different applications, so they also need to provide a similar and corresponding test condition for detection, such as FOV (Field of View) and object distance. How to provide it in a limited space to meet different object distances The structure and the angle of view are really important. For example, the object distance of general market camera lenses, monitors or telescopes is a few meters or thousands of meters, and the angle of view may be from 2 degrees to 165 degrees or even greater.

FIG. 1 shows a schematic diagram of a conventional optical simulation device capable of shortening the object distance. Figure 1 shows a technology that can shorten the object distance disclosed in Taiwan Publication No. 201409007. Please refer to Fig. 1, an optical simulation device 3 capable of shortening the object distance for projecting an image of a test screen 2 on the test lens 1 placed at the exit pupil of the optical simulation device 3, and can use a shorter object distance u, let the lens to be tested 1 capture a larger virtual screen 2'. According to the conventional technology in Figure 1, relay lenses can be used to shorten the actual distance for long-object distances. However, similar architectures are used for wide-angle or fisheye lenses or image modules. The design and production of relay lenses are There is considerable difficulty.

Taiwan Patent No. I282900 discloses another optical system technology that shortens the optical path. It adds an equivalent lens and simulates the required object distance by adjusting the distance between the lenses. The same is equivalent in the test of a wide-angle or fisheye lens. The design and production of the lens are equally difficult.

Fig. 2 shows a schematic diagram of a conventional lens detection device for detecting a lens. The technology of Figure 2 is an infinite-finite distance conjugate system. As shown in FIG. 2, the lens inspection device 100 includes a target 110, a light source 120, a lens 130 to be tested, a plurality of telephoto image modules 140 and a curved track 150. The light from the light source 120 penetrates the target 110, the target 110 is engraved with a pattern to be analyzed, and then the light is projected to a telephoto image module 140 through the lens 130 to be measured. The telephoto image module 140 includes a telephoto lens 141 and an image sensor 142. The telephoto lens 141 provides an infinite object distance, and the image sensor 142 obtains an image containing the pattern of the target 110, and uses a computer and software calculations (not shown) to obtain the image quality. In the lens inspection device 100 shown in FIG. 2, multiple sets of telephoto image modules 140 can be installed to measure the image quality of different field of view (FOV) at the same time, and the telephoto image module 140 can also be used as required. Moving along the curved surface of the curved track 150 can measure the image quality of another different viewing angle. The advantage of this architecture is that there are fewer restrictions on the wide-angle lens.

FIG. 3 shows a schematic diagram of a use state of the lens and image module detection device of the prior art of FIG. 2. As shown in FIG. 3, according to the conventional technology of FIG. 2, when a plurality of telephoto image modules 140 are placed in the middle part of the curved track 250 to measure the optical properties of the central part of the optical device 230 to be tested, the telephoto The mechanism interference between the image modules 140 can only measure the viewing angle greater than a specific specification. The disadvantage of the conventional technology is that it cannot be measured when the viewing angle is smaller than a specific specification.

In order to overcome the problem of viewing angle measurement limitation, Taiwan Patent No. M567860 discloses an optical detection device for detecting an optical device to be tested and has the feature of small viewing angle measurement limitation. However, based on the aforementioned conventional technologies, there is still room for improvement.

An objective of an embodiment according to the present invention is to provide an optical detection device for detecting a first optical device under test whose optical path is non-linear. According to another embodiment of the present invention, an object is to provide an optical detection device for detecting a first optical device under test and a second optical device under test whose optical paths are non-linear, and the first optical device under test It is different from the second optical device under test.

In one embodiment, an optical detection device is provided for detecting a first optical device under test whose optical path is non-linear. The optical detection device includes a target, a light source and an image sensing module. The light source is used for forming a light, which is suitable for irradiating the first optical device under test after penetrating the target. The image sensing module is configured to receive the light from the first optical device to be tested for capturing an image containing a pattern of the target. The target is set in the light source after the light passes through the target, and cannot directly enter the image sensing module, but can enter the position of the image sensing module after passing through the first optical device to be tested.

In one embodiment, an optical detection device is provided for detecting a non-linear optical path. A first optical device under test and a second optical device under test, and the first optical device under test is different from the second optical device under test. The optical detection device includes: a target, a light source, an image sensing module, and a target moving mechanism. The light source is used for forming a light beam suitable for irradiating the first optical device under test or the second optical device under test after penetrating the target. The image sensing module receives the light from the first optical device under test or the second optical device under test, and is used to capture an image containing the pattern of the target. The target moving mechanism is connected to the target. The target moving mechanism is configured to have: a first state for detecting the first optical device under test; and a second state for detecting the second optical device under test. In the first state, it is configured to enable the light passing through the target to enter the image sensing module after passing through the first optical device to be measured, and the target is set on the light source. After passing through the target, light cannot directly enter the image sensing module, but can enter the position of the image sensing module after passing through the first optical device to be measured. In the second state, it is configured to enable the light passing through the target to enter the image sensing module after passing through the second optical device to be measured.

In an embodiment, the optical path of the second optical device under test is a straight line.

In one embodiment, the target moving mechanism includes: a target fixing seat, an optical path changing element, and a target displacement device. The target is arranged on the target fixing seat and faces a first direction. The optical path changing element is arranged on the target holder and faces a second direction, the first direction is different from the second direction, and the optical path changing element is arranged to be from the first optical under test in the first state The light of the device is transmitted to the image sensing module. The target holder is connected to the target displacement device, and the target holder can be in a first position and a second position of the target displacement device In the first state of the target moving mechanism, the target fixing seat is in the first position, and in the second state of the target moving mechanism, the target fixing seat is in the first position. Two positions.

In one embodiment, the target is located on a light-incident side facing the first optical device under test, and the light path changing element is located on a light-emitting side facing the first optical device under test and can allow the light to enter the image The location of the sensing module. Or, in the first direction, the light path changing element and the target are respectively located at different positions. Alternatively, the light path changing element and the target are at positions staggered in the first direction.

In one embodiment, the optical detection device further includes a first adjustment axis module. The first adjustment axis module is disposed on the target fixing base and connected to the target for adjusting the position of the target.

In one embodiment, the optical detection device further includes a second adjustment axis module. The second adjustment axis module is disposed on the target holder and connected to the optical path changing element for adjusting the position of the optical path changing element.

In one embodiment, the first adjustment axis module or the second adjustment axis module includes at least one dimension adjustment device. Alternatively, the first adjustment axis module or the second adjustment axis module includes a five-axis adjustment device.

In one embodiment, the image sensor module includes: a track, at least one telephoto image module, at least one image sensor, and a transposition mechanism. At least one telephoto image module is placed on the track, and The at least one telephoto image module is adapted to form an infinite object distance, and is adapted to receive the light from the first optical device under test or the second optical device under test. At least one image sensor is adapted to receive the light from the first optical device under test or the second optical device under test. The target moving mechanism is movably disposed on the transposition mechanism and is selectively located at a first light path state position or a second light path state position, so that the at least one image sensor and the target are respectively located at a first Optical path state or a second optical path state. In the first light path state, the at least one image sensor can receive the light from the first optical device under test or the second optical device under test. In the second optical path state, the at least one image sensor does not receive the light from the first optical device under test or the second optical device under test.

In one embodiment, the image sensor module includes: a track, at least one telephoto image module, at least one image sensor, another optical path changing element, and a transposition mechanism. At least one telephoto image module is placed on the track, and the at least one telephoto image module is adapted to form an infinite object distance, and is adapted to receive the first optical device under test or the second optical device under test Light. At least one image sensor is adapted to receive the light from the first optical device under test or the second optical device under test. The transposition mechanism supports the other optical path changing element, and selectively positions the another optical path changing element at a first optical path state position or a second optical path state position, so that the at least one image sensor and the mark are respectively The target is in a first light path state or a second light path state. In the first optical path state, the at least one image sensor can receive the light from the first optical device under test or the second optical device under test; and in the second optical path state, the at least one image The sensor does not receive the light from the first optical device under test or the second optical device under test.

According to the optical detection device of an embodiment of the present invention, a first optical device to be tested whose optical path is non-linear can be detected. According to another embodiment of the optical detection device of the present invention, a first optical device under test and a second optical device under test whose optical paths are non-linear can be detected simultaneously, and the first optical device under test is different from the first optical device under test. The second optical device to be tested.

100: Lens detection device

110: Target

120: light source

130: lens to be tested

140: Telephoto image module

141: Telescope lens

142: Image Sensor

150: curved track

200-205: Optical detection device

210: Target

220: light source

231: The first optical device to be tested

232: The second optical device to be tested

240: Telephoto image module

240a: Telephoto image module

241: Telescope lens

242: Image Sensor

245: Image Sensor

250: curved track

251: The First Track

252: The second track

260: Relay lens

270: Target Moving Mechanism

271: Target Displacement Device

272: Target holder

273: Extension Arm

274: Optical Path Change Element

280: Adjust axis module

280a: Adjust the axis module

280b: Adjust the axis module

281: The first dimension adjustment device

282: Second Dimension Adjustment Device

289: Computer

291: sensor mount

292: Distance Adjustment Device

340: Image sensor module

370: Transposition Mechanism

374: Optical Path Change Element

Figure 1 shows a schematic diagram of a conventional lens and image module detection device.

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

FIG. 3 shows a schematic diagram of a use state of the lens and image module detection device of the prior art of FIG. 2.

FIG. 4 shows a schematic diagram of an optical detection device according to an embodiment of the invention.

FIG. 5a shows a schematic diagram of a first state of the optical detection device according to an embodiment of the present invention.

Fig. 5b shows a schematic diagram of a second state of the optical detection device of the embodiment of Fig. 5a.

FIG. 6a shows a schematic diagram of a first state of the optical detection device according to an embodiment of the present invention.

FIG. 6b shows a schematic diagram of a first state of the optical detection device according to an embodiment of the present invention.

FIG. 7 shows a schematic diagram of a first state of the optical detection device according to an embodiment of the present invention.

FIG. 8 shows a schematic diagram of a first state of the optical detection device according to an embodiment of the present invention.

Periscope Lens (Periscope Lens) is a kind of light made by the principle of light reflection Learn instrument. The periscope lens can include the "periscope zoom" function, commonly known as the "internal zoom" function. Since the optical zoom is done inside the body, the filter can be easily installed without the need for an additional lens barrel. Since the length of the lens barrel is fixed, the sealing process can be carried out very conveniently, so the sealing performance will be better. With the continuous advancement of technology, the periscope lens has not only been used in digital cameras, but has also been widely used in some mobile phone products.

According to an embodiment of the present invention, an optical detection device is provided which can be used to detect a periscope lens. According to another embodiment of the present invention, an optical detection device is provided, which has a switchable turning light path structure. Preferably, the optical detection device can take into account the detection functions of a general lens and a periscope lens. A more specific description is as follows.

FIG. 4 shows a schematic diagram of an optical detection device according to an embodiment of the invention. As shown in FIG. 4, the optical detection device 200 is used to detect a first optical device to be tested 231, which includes a light source 220, a target 210 and an image sensing module 340. In one embodiment, an adjustment axis module 280 may be further included. In another embodiment, a computer 289 may be further included. In one embodiment, the light from the light source 220 penetrates the target 210, the target 210 is engraved with the pattern to be analyzed, and then the light is projected to an image sensing module 340 through the first optical device 231 to be tested. The image sensing module 340 is used to capture an image including the pattern of the target 210. In one embodiment, the image sensor module 340 includes a plurality of telephoto image modules 240 and a plurality of image sensors 245. In detail, the image sensor 245 of the image sensor module 340 captures an image containing the pattern of the target 210, and the telephoto image module 240 can form an infinite object distance and capture an image, more specifically In other words, the telephoto image module 240 includes a telephoto lens 241 and an image sensor 242. Telescope lens 241 provides an infinite object distance, image sensor 242 captures an image containing the pattern of the target 210.

The optical inspection device 200 uses a computer 289 that stores software calculations to calculate the image captured by the image sensing module 340, so as to know the image quality to detect the characteristics of the first optical device 231 under test.

In an embodiment, the first optical device to be tested 231 may be an optical device with a non-linear optical path, preferably a periscope lens. In FIG. 4, the optical path of the first optical device to be tested 231 is non-linear, and the light enters from the left side and exits from the upper side, that is, the optical path turns 90 degrees. Therefore, the target 210 is set at "after the light from the light source 220 passes through the target 210, it cannot directly enter the image sensor module 340 (in one embodiment, the light cannot enter the telephoto image module 240 or the image sensor 245). However, it can enter the position of the image sensing module 340″ after passing through the first optical device 231 to be tested. In the embodiment of FIG. 4, the target 210 faces a first side, and the light-emitting surface of the first optical device 231 under test faces a second side, and the first side is different from the second side. Preferably, the first side is substantially perpendicular to the second side. The so-called "substantially perpendicular to" means that the angle between the two is between about 80 degrees and 100 degrees.

The adjustment axis module 280 is connected to the target 210 for adjusting the position of the target 210. In one embodiment, the adjustment axis module 280 may include at least one dimension adjustment device, preferably, for example, a first dimension adjustment device 281 and a second dimension adjustment device 282 for adjusting the first dimension and The value of the second dimension, where the first dimension is different from the second dimension. In an embodiment, the first dimension or the second dimension may be the x linear axis, the y linear axis, the z linear axis, the first rotation axis, and the second dimension. One of the rotation axis. In one embodiment, the adjustment axis module 280 is a five-axis adjustment device, which has 3 adjustable linear axes and 2 rotary axes. The computer 289 may be a device capable of performing calculations such as a computer, a personal computer, a tablet computer, a notebook computer, and a smart phone. Preferably, it may be a device that automatically executes any sequence of arithmetic or logic operations according to a series of instructions. In one embodiment, the adjustment axis module 280 can also be coupled to the computer 289, and the computer 289 can control the adjustment axis module 280 so that the target 210 is located at an appropriate detection position.

In an embodiment, the optical inspection device 200 may further include a curved track 250. As shown in FIG. 4, the middle part of the curved track 250 is in a hollow state, so that when the image sensors 245 and the target 210 are in a first light path state, the light from the light source 220 passes through the middle part, and finally enters To the image sensors 245. More specifically, the arcuate track 250 includes a first track 251 and a second track 252. The first track 251 and the second track 252 are separated by a predetermined distance, so that the middle portion of the arcuate track 250 is hollow, and The light from the light source 220 passes through, and finally enters the image sensors 245. According to the conventional technology, it cannot be measured when the viewing angle is smaller than a specific specification. However, according to the aforementioned design, even if the viewing angle is smaller than the specified specification, measurement can be performed.

In one embodiment, the optical detection device 200 may further include an extension arm 273 connected to and fixed to the telephoto image module 240a, and capable of selectively moving the telephoto image module 240a to extend to the middle of the curved track 250. According to this embodiment, the middle part of the curved track 250 is hollow, and there is a problem that the middle part cannot be measured by the telephoto image module 240. In view of this, in one embodiment, the extension arm 273 is connected to a telephoto image module 240a in the middle of the curved track 250 among the telephoto image modules 240, and the extension arm 273 is used to move the telephoto image module 240a, make hope The tele image module 240a is selectively located in the middle part of the curved track 250 and not in the middle part. More specifically, in the second optical path state, the telephoto image module 240a is further located in the middle part of the curved track 250, so that the target 210 does not face the image sensors 245; and in the first optical path state, the telephoto module 240a The image module 240a is not located in the middle part of the curved track 250, so that the target 210 faces the image sensors 245. Different from the prior art, this embodiment uses a manual or electric motor or similar transposition mechanism to make the central telephoto image module 240a displaceable, and preferably displaces to the effective light path that does not cover the smaller viewing angle, and is smaller. The inspection of the viewing angle is changed to use the actual object distance with image sensing for related optical quality inspection.

In an embodiment, the optical detection device 200 may further include a relay lens 260, which is located in the middle part of the curved track 250, and is adapted to allow the light from the light source 220 to pass through the interior of the relay lens 260 and then enter the relay lens 260. The image sensors 245. The relay lens 260 can adjust the size of the object distance. Therefore, according to this embodiment, when the small angle of view and the object distance are far away, the relay lens 260 can be used to adjust the size of the object distance, so as to achieve the effect of reducing the size of the detection device. According to this embodiment, a relay lens 260 is added to the center of the optical inspection device 200 to test a smaller viewing angle and shorten the object distance. Since the distance from the image sensor 245 to the relay lens 260 is adjustable, it can simulate different object distance conditions.

In an embodiment, the optical inspection device 200 may further include a sensor fixing base 291 and a distance adjusting device 292. The image sensors 245 are arranged on the sensor fixing base 291, and the sensor fixing base 291 is connected to the distance adjusting device 292, which is used to change the image sensors 245 and the first to-be-tested The distance between the optical devices 231. In one embodiment, the sensor holder 291 can It can move on the distance adjusting device 292, preferably on the long axis of the distance adjusting device 292, so that the distance between the image sensors 245 and the first optical device 231 under test can be changed. When the relay lens 260 is removed or a different relay lens 260 is updated, the distance between the image sensors 245 and the first optical device 231 to be tested can be adjusted to set the image sensors 245 at In the right place.

In one embodiment, it is suitable for the image sensors 245 and the target 210 to be in a first light path state or a second light path state. In the first optical path state, the image sensors 245 can receive light from the first optical device to be tested 231; while in the second optical path state, the image sensors 245 do not receive light from the first optical device to be tested The light of the device 231. In this embodiment, in the first light path state, the target 210 faces the image sensors 245 to receive light and capture an image; and in the second light path state, the target 210 does not face the images感器245.

FIG. 5a shows a schematic diagram of a state of the optical detection device according to an embodiment of the present invention. Fig. 5b shows a schematic diagram of another state of the optical detection device of the embodiment of Fig. 5a. The embodiments of FIGS. 5a and 5b are similar to the embodiment of FIG. 4, so the same elements use the same symbols, and related descriptions are omitted. As shown in FIGS. 5a and 5b, according to an embodiment of the present invention, an optical detection device 201 is provided, which can simultaneously detect two different first optical devices to be tested 231 and second optical devices 232 to be tested. In one embodiment, the first optical device under test 231 is an optical device with a non-linear optical path, and the second optical device under test 232 is an optical device with a linear optical path.

In an embodiment, a target moving mechanism 270 may be further included, which is configured to have a first State and a second state. The first state is used to detect the first optical device to be tested 231, and the second state is used to detect the second optical device to be tested 232. When the target moving mechanism 270 is in the first state, the light from the light source 220 passing through the target 210 can enter the image sensing module 340 after passing through the first optical device to be measured 231; In the state, the light from the light source 220 passing through the target 210 can enter the image sensing module 340 after passing through the second optical device 232 to be measured. In this way, the image sensing module 340 can capture an image including the pattern of the target 210 passing through the first optical device to be tested 231 and the second optical device 232 to be tested. Then, the optical inspection device 201 uses a computer 289 storing software calculations to calculate the image, so as to know the image quality, so as to achieve the function of detecting two different optical devices under test in a balanced manner.

As shown in FIG. 5a, the target moving mechanism 270 includes an optical path changing element 274, a target displacement device 271, and a target fixing seat 272. The target 210 is disposed on the target holder 272 and faces a first direction, and the light path changing element 274 is disposed on the target holder 272 and faces a second direction, and the first direction is different from the second direction. The light path changing element 274 is configured to transmit the light from the light emitting side of the first optical device 231 to be measured to the orientation of the image sensing module 340 in the first state. In this embodiment, the target 210 faces the image sensor 245, and faces the upper side (the first direction) in FIG. 5a. In addition, in the first direction, the light path changing element 274 and the target 210 are respectively located at different positions. Preferably, the target 210 is located on the light-incident side facing the first optical device to be tested 231, and the light path changing element 274 is located on the light-emitting side facing the first optical device 231 to be tested and can allow light to enter the image sensing module 340 Location. In an embodiment, the different position may be a position staggered in the first direction, for example.

The target fixing seat 272 is connected to the target displacement device 271, and the target fixing seat 272 can move between a first position and a second position of the target displacement device 271. In the first state of the target moving mechanism 270, the target fixing seat 272 is in the first position (as shown in FIG. 5a), and in the second state of the target moving mechanism 270, the target fixing seat 272 is in the second position ( Figure 5b). Fig. 5b is the second state of the target moving mechanism 270, the target fixing seat 272 is in the second position, and the target 210 is in the second optical device 232 under test. More specifically, in the first direction, the target The target 210, the light incident surface of the second optical device under test 232, and the light output surface of the second optical device under test 232 are all located at the same position.

In an embodiment, the optical detection device 201 may further include a first adjustment axis module 280a. In an embodiment, a second adjustment axis module 280b may be further included. The first adjustment axis module 280a is disposed on the target fixing seat 272 and connected to the target 210 for adjusting the position of the target 210. The second adjustment axis module 280 b is disposed on the target fixing base 272 and connected to the light path changing element 274 for adjusting the position of the light path changing element 274. In this embodiment, since the first adjustment axis module 280a is disposed on the target fixing seat 272 (in one embodiment, it is preferable that the second adjustment axis module 280b is also disposed on the target fixing seat 272 at the same time. ), so when the target fixing seat 272 moves, the positions of the target 210 and the light path changing element 274 can be adjusted so that the light path of the light can be in a more appropriate position.

In an embodiment, the first adjustment axis module 280a and the second adjustment axis module 280b may include at least one dimension adjustment device. In an embodiment, the first adjustment axis module 280a and the second adjustment axis module 280b may be or at least include a five-axis adjustment device. In an embodiment, the first adjustment axis module 280a and the second adjustment axis module 280b may have the same structure as the adjustment axis module 280.

Fig. 6a shows a schematic diagram of a state of the optical detection device according to an embodiment of the present invention. The embodiment of FIG. 6a is similar to the embodiment of FIG. 5a, so the same elements use the same symbols, and related descriptions are omitted. In the optical detection device 202 of the embodiment of FIG. 6a, the image sensing module 340 includes a plurality of telephoto image modules 240. Moreover, in one embodiment, the image sensor 245, the sensor mount 291, the distance adjustment device 292, or the relay lens 260 are preferably not included. In addition, in the embodiment of FIG. 6a, the light source 220 is not disposed on the target fixing seat 272. In addition, those who have general knowledge in the field can appropriately set the light source 220 at an appropriate position.

FIG. 6b shows a schematic diagram of a state of the optical detection device according to an embodiment of the present invention. The embodiment of FIG. 6b is similar to the embodiment of FIG. 5a, so the same elements use the same symbols, and related descriptions are omitted. In the optical detection device 203 of the embodiment in FIG. 6b, the image sensor module 340 includes an image sensor 245, a sensor mount 291, a distance adjustment device 292, or a relay lens 260. Moreover, in one embodiment, a plurality of telephoto image modules 240 are preferably not included. In addition, in the embodiment of FIG. 6b, the light source 220 is not arranged on the target fixing seat 272. In addition, those who have general knowledge in the field can appropriately set the light source 220 at an appropriate position.

FIG. 7 shows a schematic diagram of a first state of the optical detection device according to an embodiment of the present invention. As shown in FIG. 7, the optical detection device 204 can also be designed to connect the structure of FIG. 6a and FIG. Which framework to test under.

The embodiment of FIG. 7 is similar to the embodiment of FIG. 5a, so the same elements use the same symbols, And its related description is omitted. As shown in FIG. 7, according to the image sensing module 340 of the optical detection device 204, the arc track 250 is a continuous arc, on which a plurality of telephoto image modules 240 are arranged, and a telephoto image module can be arranged at the center of the track 250 240a. A plurality of image sensors 245 are arranged beside the curved track 250. In addition, the relay lens 260 may also face the image sensors 245.

The optical detection device 204 further includes a transposition mechanism 370. The target moving mechanism 270 is movably disposed on the transposition mechanism 370, so that the target moving mechanism 270 can be selectively located at the first light path state position or the second light path state position. In the first position, the target moving mechanism 270 is outside the arcuate track 250 (or facing the image sensor 245 or the relay lens 260); at the second position, the target moving mechanism 270 is inside the arcuate track 250 ( Or facing the telephoto image modules 240 or curved track 250). When the target moving mechanism 270 is inside the arc track 250, the light from the target 210 can pass through the first optical device to be tested 231 or the second optical device to be tested 232, and then enter the telephoto image module of the image sensing module 340 240 (240a), and the telephoto image module 240a located at the center of the curved track 250 can be used for optical measurement. When the target moving mechanism 270 is outside the arc track 250, the image sensors 245 and the target 210 are in the first light path state, and the target 210 faces the image sensors 245, so that the light from the light source 220 can pass through After the target 210 (or the relay lens 260), it can enter the image sensors 245 again.

In one embodiment, the optical detection device 204 may further include a relay lens 260, which is arranged in front of the image sensors 245. More specifically, the target moving mechanism 270 is on a curved track 250. When the relay lens 260 is located outside the optical path changing element 274 (or the optical device under test 232 (not shown)) and the image sensors 245. Relay lens 260 can adjust the object distance Therefore, the relay lens 260 can be used to adjust the size of the object distance, so as to achieve the effect of reducing the size of the detection device. In one embodiment, the image sensors 245 are close to or adjacent to each other, so as to be able to perform optical detection in the case of a small viewing angle. In an embodiment, it is preferable that the aforementioned test framework can be used independently and form an independent detection device by itself.

FIG. 8 shows a schematic diagram of a first state of the optical detection device according to an embodiment of the present invention. The embodiment of FIG. 8 is similar to the embodiment of FIG. 7, so the same elements use the same symbols, and related descriptions are omitted. As shown in FIG. 8, the optical detection device 205 includes a target 210, a light source 220, a first optical device to be tested 231, a plurality of telephoto image modules 240, a plurality of image sensors 245, and a curved track 250 , A transposition mechanism 370 and a light path changing element 374. The curved track 250 is a continuous curved surface, and a telephoto image module 240a can be provided at the center of the curved track 250.

The transposition mechanism 370 supports the light path changing element 374 and selectively positions the light path changing element 374 at the first light path state position or the second light path state position. At the position of the first light path state, the light path changing element 374 faces the light path changing element 274 (as shown in FIG. 8) or the second optical device 232 (not shown), so as to change the light path to make the images feel The detector 245 and the target 210 are in the first light path state. When in the second light path state position, the light path changing element 374 does not face the light path changing element 274 or the second optical device 232 under test, so that the image sensors 245 and the target 210 are in the second light path state.

When the image sensors 245 and the target 210 are in the second light path state, the light path changing element 374 does not change the light path, and a telephoto image module located at the center of the curved track 250 can be used 240a performs optical measurement. When the image sensors 245 and the target 210 are in the first light path state, the light path changing element 374 (reflecting element) is used to change the light path, so that the light from the light source 220 passes through the target 210 and the first optical device 231 (or After the second optical device to be tested 232), the light path is changed by the light path changing element 374, and can enter the image sensors 245 again.

It should be understood that the optical light path is reversible. Therefore, in addition to the architecture of the foregoing embodiments (known as reverse projection), a front projection structure can also be used, that is, the light source 210, the target 220, and the image sensing module 340 are interchanged. Since the light path states are similar, it is also true. In this front projection architecture, in addition to the lens, modules with image sensors, such as cameras, can also be tested.

In an embodiment of the present invention, the first optical device to be tested 231 and the second optical device to be tested 232 may also be a lens to be tested or an image module to be tested. The lens and image module can be, for example, a camera lens, a monitor, or a telescope. In addition, the indexing mechanism may be a manual indexing mechanism or an indexing mechanism including an electric motor.

200: Optical detection device

210: Target

220: light source

231: The first optical device to be tested

240: Telephoto image module

241: Telescope lens

242: Image Sensor

245: Image Sensor

250: curved track

251: The First Track

252: The second track

260: Relay lens

280: Adjust axis module

281: The first dimension adjustment device

282: Second Dimension Adjustment Device

289: Computer

291: sensor mount

292: Distance Adjustment Device

340: Image sensor module

Claims (11)

An optical detection device for detecting a first optical device to be tested whose optical path is non-linear, comprising: A target A light source for forming a light beam suitable for irradiating the first optical device under test after penetrating the target; and An image sensing module configured to receive the light from the first optical device under test for capturing an image containing a pattern of the target, in, The target is arranged after the light from the light source passes through the target, and cannot directly enter the image sensing module, but can enter the position of the image sensing module after passing through the first optical device to be tested. An optical detection device for detecting a first optical device under test and a second optical device under test whose optical paths are non-linear, and the first optical device under test is different from the second optical device under test, the The optical detection device includes: A target A light source for forming a light beam suitable for irradiating the first optical device under test or the second optical device under test after penetrating the target; An image sensing module that receives the light from the first optical device to be tested or the second optical device to be tested to capture an image containing the pattern of the target; and A target moving mechanism connected to the target, wherein The target moving mechanism is configured to have: a first state for detecting the first optical device under test; and a second state for detecting the second optical device under test, In the first state, it is configured to enable the light passing through the target to pass through the first After an optical device to be tested, it can enter the image sensing module, and the target is set after the light from the light source passes through the target, and cannot directly enter the image sensing module, but can pass through the An optical device to be tested enters the position of the image sensing module, and In the second state, it is configured to enable the light passing through the target to enter the image sensing module after passing through the second optical device to be measured. The optical detection device according to claim 2, wherein the optical path of the second optical device under test is a straight line. The optical detection device according to claim 2, wherein: The target moving mechanism includes: a target fixing seat, a light path changing element and a target displacement device, The target is set on the target holder and faces a first direction, The optical path changing element is arranged on the target holder and faces a second direction, the first direction is different from the second direction, and the optical path changing element is arranged to be from the first optical under test in the first state The light of the device is transmitted to the image sensing module, and The target fixing seat is connected to the target displacement device, and the target fixing seat can move between a first position and a second position of the target displacement device, wherein the first position of the target moving mechanism In the state, the target fixing seat is in the first position, and in the second state of the target moving mechanism, the target fixing seat is in the second position. The optical detection device according to claim 4, wherein: When the target moving mechanism is in the second state, the target fixing seat is in the second position, and the target surface is in the second optical device under test. The optical detection device according to claim 5, wherein: The target is located at a light incident side facing the first optical device under test, and the optical path changing element The component is located at a position facing a light-emitting side of the first optical device under test and capable of allowing the light to enter the image sensing module; or In the first direction, the light path changing element and the target are respectively located at different positions; or The light path changing element and the target are at positions staggered in the first direction. The optical detection device according to any one of claims 4-6, further comprising: A first adjustment axis module is arranged on the target fixing seat and connected to the target for adjusting the position of the target. The optical detection device according to claim 7, further comprising: A second adjusting axis module is arranged on the target fixing base and connected to the light path changing element for adjusting the position of the light path changing element. The optical detection device according to claim 8, wherein: The first adjustment axis module or the second adjustment axis module includes at least one dimension adjustment device, or The first adjustment axis module or the second adjustment axis module includes a five-axis adjustment device. The optical detection device according to any one of claim 2-6, wherein the image sensing module includes: One track At least one telephoto image module is placed on the track, and the at least one telephoto image module is adapted to form an infinite object distance and is adapted to receive data from the first optical device under test or the second optical device under test The light At least one image sensor adapted to receive the light from the first optical device under test or the second optical device under test; and A transposition mechanism, wherein the target moving mechanism is movably disposed on the transposition mechanism and is selectively located at a first light path state position or a second light path state position, so that the at least one image sensor and The target is in a first light path state or a second light path state, In the first light path state, the at least one image sensor can receive the light from the first optical device under test or the second optical device under test; and In the second optical path state, the at least one image sensor does not receive the light from the first optical device under test or the second optical device under test. The optical detection device according to any one of claim 2-6, wherein the image sensing module includes: One track At least one telephoto image module is placed on the track, and the at least one telephoto image module is adapted to form an infinite object distance and is adapted to receive data from the first optical device under test or the second optical device under test The light At least one image sensor adapted to receive the light from the first optical device under test or the second optical device under test; Another optical path changing element; and A transposition mechanism supports the other optical path changing element, and selectively positioning the other optical path changing element at a first optical path state position or a second optical path state position, so that the at least one image sensor and The target is in a first light path state or a second light path state, In the first light path state, the at least one image sensor can receive data from the first under-test The light of the optical device or the second optical device to be tested; and In the second optical path state, the at least one image sensor does not receive the light from the first optical device under test or the second optical device under test.

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