TWI454685B - Transmission interface and lens test apparatus using the same - Google Patents

Description

Transmission interface and lens detecting device using the same

The present invention relates to a transmission interface and a lens detecting device, and more particularly to a transmission interface capable of controlling a plurality of sensing elements and a lens detecting device using the same.

At present, lenses have been widely used in optical devices such as digital cameras. In the manufacturing process, the lens quality is changed due to process variations. Therefore, the lens must be tested before leaving the factory to determine that the manufactured lens conforms to the original design specifications.

Figure 1 shows a schematic view of a conventional light box for detecting a lens. Referring to FIG. 1 , the optical box 10 includes a housing 11 , a loading table 12 disposed in the housing 11 , a light source 13 , at least one image sensor 14 , a host 15 , a test pattern 16 , and a test unit 16 . The lens 17 and an adjustment shaft 18 are provided. To detect different characteristics of the lens 17, different test patterns 16 can be used. When the detection is performed, the light from the light source 13 is irradiated to the test pattern 16, and then penetrates through the lens 17 and is irradiated to the image sensor 14. The image sensor 14 captures an image and transmits it to the host computer 15, and then analyzes the captured image by using the host computer 15 to obtain, for example, a resolution, an opto-electric conversion function (OECF), and an ash. Information such as gradation, modulation transfer function (MTF), or optical spatial responses. The stage 12 is movable in the direction of the adjustment shaft 18 to adjust the distance between the image sensor 14 and the detection lens 17.

It is an object of an embodiment of the present invention to provide a transmission interface capable of controlling a plurality of sensing elements and a lens detecting device using the transmission interface.

According to an embodiment of the invention, a transmission interface is provided for coupling between a plurality of sensing elements and a host. The transmission interface includes a plurality of signal input boards and a signal mixing board. The signal input boards are coupled to the sensing elements, and the sensing elements are controlled according to a control signal of the host, and the plurality of sensing materials are downloaded from the sensing elements. The signal mixing board is coupled to the signal input boards, receives the sensing materials from the signal input boards at different times, adds an index mark to each sensing data, and adds the sensing materials mixing. And the host receives the sensing materials including the index mark.

According to an embodiment of the invention, a lens detecting device is provided. The lens detecting device comprises a plurality of sensing elements, a host and a transmission interface. The transmission interface includes a plurality of signal input boards and a signal mixing board. The signal input boards are coupled to the sensing elements, and the sensing elements are controlled according to a control signal of the host, and the plurality of sensing materials are downloaded from the sensing elements. The signal mixing board is coupled to the signal input boards, receives the sensing materials from the signal input boards at different times, adds an index mark to each sensing data, and adds the sensing materials mixing. And the host receives the sensing materials including the index mark.

In an embodiment, the host sends an abnormal notification signal according to the index marks of the received sensing materials. Preferably, when the host determines that the index marks have an abnormal condition, an abnormal notification signal is sent.

In one embodiment, each sensing component is a linear sensing component, and the linear sensing components comprise a first linear sensing component and a second linear sensing component. The signal input boards include a first signal input board and a second signal input board. The first signal input board is coupled to the first line type sensing element and controls the first line type sensing element to enable the first line type sensing element to be at a first exposure start time to a first exposure end time After the exposure, the sensing data of the first line type sensing element is downloaded between a first download start time and a first download end time. The second signal input board is coupled to the second line type sensing element and controls the second line type sensing element to expose the second line type sensing element between a second exposure start time and a second exposure end time. And sensing data of the second line type sensing element is downloaded between a second download start time and a second download end time. The second download initiation time is later than or substantially equal to the first download end time. The first exposure start time to the first exposure end time; and the second exposure start time to the second exposure end time is a preset exposure period.

In one embodiment, the second exposure start time is later than or substantially equal to the first download end time minus the time point of the preset exposure period.

In one embodiment, the first download start time to the first download end time; and the second download start time to the second download end time are a preset download period. And the second exposure start time is later than or substantially equal to the first exposure start time plus the time point of the preset download period.

In one embodiment, the sensing data includes a first simulation segment and a data segment, and an index mark is added to the first simulation segment. Preferably, the sensing data further includes a second simulation segment, and the data segment is between the first simulation segment and the second simulation segment.

In an embodiment, the transmission interface further includes an assembly control board. The assembly control board is coupled between the signal mixing board and the host to encode the control signal of the host, wherein the signal mixing board decodes the encoded control signal, and then transmits the decoded control signal to the control signal. These signal input boards.

According to an embodiment of the present invention, a transmission interface of a lens detecting device capable of controlling a plurality of sensing elements and detecting which component has an error and replacing a single component can be provided, thereby effectively determining the signal The location of the disconnection is convenient for troubleshooting, and the input device settings are modified under the same architecture of the transmission interface to expand the lens detecting device to more groups of sensing components. In one embodiment, the data of the sensing elements can also be downloaded at different times, and the sensing elements can be systematically controlled to have the same exposure setting.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein. The above and other objects, features, and advantages of the invention will be apparent from

Fig. 2 is a schematic side view showing a stage of a lens detecting device according to an embodiment of the present invention. As shown in FIG. 2, a plurality of image sensing devices 220 are disposed on a stage 210 of the lens detecting device 200. In this embodiment, the image sensing device 220 has nine different positions respectively disposed on the stage 210 for accurately obtaining sensing data of various parts of the lens. 3 is a schematic diagram showing an image sensing device according to an embodiment of the present invention. As shown in FIG. 3 , in the embodiment, the image sensing device 220 includes a circuit board 223 and two linear sensing elements 221 disposed on the circuit board 223 , and the extending direction of the linear sensing element 221 is perpendicular to The direction in which the other linear sensing element 221 extends.

The line type sensing element 221 can be, for example, a sensor used in a scanner. The line sensing element 221 is limited to the use of a single element. For example, the scanner is a system that controls the single line type sensing element 221. There is no system capable of efficiently controlling a plurality of line type sensing elements 221 according to the prior art. Moreover, a single component is a single input, which is quite messy and inefficient, and has problems in detecting difficulties.

4A is a schematic diagram showing the architecture of a lens detecting device according to an embodiment of the present invention. Fig. 4B is a functional block diagram showing the lens detecting device of Fig. 4A. As shown in FIG. 4A and FIG. 4B, the lens detecting device 200 further includes a transmission interface 230 and a host 240. The image sensing device 220 is coupled to the host 240 via the transmission interface 230. The transmission interface 230 includes an assembly control board 231, a signal mixing board 232, and a plurality of signal input boards 233. The signal input board 233 is coupled to the image sensing device 220. More specifically, in the embodiment, a signal input board 233 is coupled to an image sensing device via a signal transmission line 250. Device 220. The signal input board 233 is coupled to the signal mixing board 232. The assembly board 231 is coupled between the host 240 and the signal mixing board 232.

Preferably, the signal transmission line 250 can be a high definition multimedia interface (HDMI) transmission line, which can transmit the trigger signal and address the control signal, the gain signal and the level signal.

In operation, the signal input board 233 sends a sensing trigger signal to its corresponding line sensing element 221 according to the control signal from the host 240 for controlling the exposure time of the line sensing element 221, preferably in each case. The exposure time of the one-line sensing element 221 is the same. In one embodiment, the signal input board 233 can further provide a gain control and trigger signal to the line sensing element 221 for adjusting the exposure time of the line sensing element 221 and controlling the signal gain and level.

The signal input board 233 downloads the line sensing data from the line sensing element 221 after a download period, and then transmits the line sensing data to the signal mixing board 232. Figure 5 shows the line sensing data for the face output format. As shown in FIG. 5, the signal mixing board 232 receives the line sensing data S01~S18 from the signal input boards 233 at different times according to the control signal from the host 240, and mixes the line sensing data S01~S18 into The face output format is transmitted to the assembly control board 231 through a bus 260. In the present embodiment, the index marks index are inserted into the line sensing data S01~S18 of the line sensing elements 221 to mark the sources of the line sensing data S01~S18.

FIG. 6 is a schematic diagram showing line sensing data transmitted from a transmission interface to a host according to an embodiment of the invention. As shown in FIG. 6, in general, the line sensing data of the line sensing element 221 includes a dummy block D1, a data block Im, and a simulation block D2, and the data block Im is in the simulation area. Block D1 and simulation block D2 are used to ensure the correctness of the data. In one embodiment, the signal mixing board 232 inserts the index mark index into the simulation block D1 for the host 240 to identify the source of the line sensing data. The index mark index may be, for example, a series of serial numbers (for example, 01 to 18), or may be a fixed position, direction, height, and the like of the linear sensing element 221. In an embodiment, the index mark index may also be inserted into the simulation block D2.

The signal of the assembly control board 231 is transmitted to the host computer 240 (e.g., a computer) through the low voltage differential signal transmission cable 270. . After receiving the line sensing data S01~S18 of the line sensing elements 221, the host 240 can perform analysis to obtain the detection result of the detecting lens 17. When a disconnection occurs, that is, the line sensing data of one of the line sensing elements 221 may not be received. At this time, the host 240 can obtain the index data of the plurality of line sensing data received. Knowing which linear sensing element 221 has an error, an abnormal notification signal is sent to inform the user of the serial number or position of the wrong linear sensing element 221. More specifically, when the host 240 analyzes and receives the index data in the plurality of line sensing data, the serial type sensing element 221 marked as the serial number 05 is erroneous.

In addition, the assembly control board 231 receives the control signal from the host 240 and encodes it, and the signal mixing board 232 receives the encoded control signal for decoding, and the plurality of signal input boards 233 receive the decoded control signal, and according to The decoded control signal generates a trigger signal as shown in FIGS. 7A and 7B.

7A shows a schematic diagram of multiple trigger signals for a plurality of line-type sensing elements in accordance with an embodiment of the present invention. The trigger signal CCD0 is used to control the line type sensing element 221 labeled 01, the trigger signal CCD1 is used to control the line type sensing element 221 of the labeled number 02, and so on. In FIG. 7, only the trigger signals CCD0 to CCD04 are taken as an example, and other trigger signals are similar to the trigger signals CCD0 to CCD04, and thus the related description is omitted.

As described above, the signal mixing board 232 receives the line sensing data S01~S18 from the signal input boards 233 at different times, so the period during which the line sensing data is downloaded from each line type sensing element 221 is also different. . In order to achieve the same exposure time of each line type sensing element 221 and receive the line sensing data S01~S18 at different times, the exposure start time and the download start time of the trigger signals CCD0 to CCD3 must be different. The following is an illustration of the exposure periods exp0 to exp3 of CCD0 to CCD3 and the dump0~dump3 during the download period. In the present embodiment, for the convenience of explanation, the exposure periods exp0 to exp3 of CCD0 to CCD3 and the dump0~dump3 during the download period are set. The same is true, but the present invention is not limited thereto, and those having ordinary knowledge in the art can change the length of the periods according to the following description.

As shown in FIG. 7A, according to the trigger signal CCD0, the line type sensing element 221 of the serial number 01 starts exposure when the time is 0 (that is, the exposure start time is 0), and the exposure ends after the period t, and the time is t. (That is, when the download start time is t), the line sensing data S01 in the line type sensing element 221 of the serial number 01 is started to be downloaded, and after the period t, the downloading process is ended. According to the trigger signal CCD1, the line type sensing element 221 of the serial number 02 starts exposure when the time is t (that is, the exposure start time is t), and the exposure ends after the period t, and the time is 2t (that is, the download starts) When the time is 2t), the line sensing data S02 in the line type sensing element 221 of the serial number 02 is started to be downloaded, and after the period t, the downloading process is ended. By analogy, the operation procedure of the other line type sensing elements 221 can be known.

The exposure start time t of the line type sensing element 221 of the serial number 02 can be substantially the same as the download start time of the line type sensing element 221 of the serial number 01, and is set to be the same during the exposure period exp0 to exp3 of the CCD0 to CCD3. Therefore, the above operation can make the time of the line type sensing element 221 of the serial number 01 and the serial number 02 the same.

The following describes an embodiment in which the exposure periods exp0 to exp3 are different from the dump0 to dump3 during the download period. As described above, the data of the line type sensing element 221 of the serial number 02 must be downloaded after the data of the line type sensing element 221 of the serial number 01 is completed, that is, the download start time of the line type sensing element 221 of the serial number 02 is later than Or substantially equal to the download end time of the line type sensing element 221 of the serial number 01. Therefore, in order to achieve the same exposure period of each of the line-type sensing elements 221, the download end time of the line-type sensing element 221 of the serial number 01 can be moved forward by a time point of a predetermined exposure period, and is set to the number 02. The exposure start time of the line type sensing element 221. In an embodiment, the exposure start time of the line type sensing element 221 of the serial number 01 is further shifted back by a predetermined download period, and the exposure of the line type sensing element 221 of the serial number 02 is started. time.

7B shows a schematic diagram of multiple trigger signals for a plurality of line-type sensing elements in accordance with an embodiment of the present invention. As shown in FIG. 7B, when the exposure periods exp0 to exp2 are both 2t, since the download periods of all the line type sensing elements 221 are the same t, the download end time of the line type sensing element 221 of the serial number 01 is 3t. After moving forward for a predetermined exposure period 2t, the obtained time point is (3t-2t)=t, so the exposure start time of the line type sensing element 221 of the serial number 02 can be set to t. The download start time of the line type sensing element 221 of the serial number 02 and the download end time of the line type sensing element 221 of the serial number 01 are substantially 3t. In an embodiment, the exposure start time of the line type sensing element 221 of the serial number 01 is 0, and after moving a predetermined download period t, the time point is (0+t)=t, so the number 02 The exposure start time of the line type sensing element 221 can be set to t.

In this embodiment, the exposure time length of the line sensing element 221 (that is, the exposure period exp0~exp3) can be made a multiple of the download period (dump0~dump3), so that the line type sensing element 221 can be systematically controlled. Same exposure setting. More specifically, the number of the linear sensing elements 221 is 18, but the present invention is not limited thereto. In the download period of all the line sensing elements 221 are the same, for example, in the case of t, the total data download time of all the line sensing elements 221, the minimum value is t*18, which is a download frame (frame) Time required. At this time, the exposure period can be set to, for example, t~t*17.

Since various operation times of the other line type sensing elements 221 are analogized with reference to FIG. 7B and the above description, the related description will be omitted below.

As described above, according to an embodiment of the present invention, it is possible to provide a transmission interface of a lens detecting device capable of controlling a plurality of linear sensing elements 221, which component can be detected to be erroneous, and a single component can be replaced. Therefore, the position of the signal disconnection can be effectively determined to facilitate troubleshooting, and the input device settings can be modified under the same architecture of the transmission interface 230, so that the lens detecting device 200 can be expanded to more sets of line sensing elements 221. The lens detecting device 200 can be assembled by using a plurality of sets of line sensing elements 221, and systematically providing exposure trigger signals, so that the line sensing elements 221 can have the same exposure time. Furthermore, through the circuit control, the index mark index is added to the line-sensing data, and the line-sensing data can be addressed to determine where the signal break occurs.

In addition, according to an embodiment, a control method that is low-cost and capable of outputting continuous line-type sensing data is developed, which is provided by a hard-wired line and is outputted by a line format formatted form format, which is also capable of positively determining each component. Address. According to the effect of an embodiment, a plurality of line type sensing materials can be provided, and a single simple output and control interface can be used to systematically control the line type sensing elements 221 to have the same exposure setting, and each line type signal gain and signal level. A detection device that requires a plurality of linear sensing elements has better control and the data signal can be addressed, and the position of the signal interruption can be easily determined.

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.

10. . . Light box

11. . . shell

12. . . Loading platform

13. . . light source

14. . . Image sensor

15. . . Host

16. . . Test pattern

17. . . Lens

18. . . Adjustment axis

200. . . Lens detecting device

210. . . Loading platform

220. . . Image sensing device

221. . . Linear sensing element

223. . . Circuit board

230. . . Transmission interface

231. . . Assembly control board

232. . . Signal mixing board

233. . . Signal input board

240. . . Host

250. . . Signal transmission line

260. . . Busbar

270. . . Transmission cable

Figure 1 shows a schematic view of a conventional light box for detecting a lens.

Fig. 2 is a schematic side view showing a stage of a lens detecting device according to an embodiment of the present invention.

3 is a schematic diagram showing an image sensing device according to an embodiment of the present invention.

4A is a schematic diagram showing the architecture of a lens detecting device according to an embodiment of the present invention.

Fig. 4B is a functional block diagram showing the lens detecting device of Fig. 4A.

Figure 5 shows the line sensing data for the face output format.

FIG. 6 is a schematic diagram showing line sensing data transmitted from a transmission interface to a host according to an embodiment of the invention.

7A shows a schematic diagram of multiple trigger signals for a plurality of line-type sensing elements in accordance with an embodiment of the present invention.

7B shows a schematic diagram of multiple trigger signals for a plurality of line-type sensing elements in accordance with an embodiment of the present invention.

200. . . Lens detecting device

210. . . Loading platform

220. . . Image sensing device

221. . . Linear sensing element

223. . . Circuit board

230. . . Transmission interface

231. . . Assembly control board

232. . . Signal mixing board

233. . . Signal input board

240. . . Host

Claims (12)

a transmission interface, configured to couple a plurality of sensing elements and a host, comprising: a plurality of signal input boards coupled to the sensing elements, and controlling the sensing elements according to a control signal of the host, And downloading a plurality of sensing materials from the sensing components; and a signal mixing board coupled to the signal input boards, and receiving the sensing materials from the signal input boards at different times, and each of the sensing materials An index mark is added to the sensing data, and the sensing materials are mixed, so that the host receives the sensing materials including the index mark, wherein each of the sensing elements is a linear sensing element. The first type of sensing element includes a first line type sensing element and a second line type sensing element. The signal input board includes: a first signal input board coupled to the first line type sensing And controlling the first line type sensing element to cause the first line type sensing element to be exposed between a first exposure start time and a first exposure end time, starting at a first download Time to the end of the first download Downloading the sensor data of a first linear sensing element; and a second signal input board coupled to the second line type sensing element and controlling the second line type sensing element to enable the second line type sensing element to be in a second exposure start time to a second exposure After the exposure between the end times, the sensing data of the second line type sensing component is downloaded between a second download start time and a second download end time, and the second download start time is later or substantially The upper limit is equal to the first download end time, the first exposure start time to the first exposure end time; and the second exposure start time to the second exposure end time is a preset exposure period. The transmission interface of claim 1, wherein the one of the linear sensing elements extends in a direction perpendicular to the other direction in which the linear sensing elements extend. The transmission interface of claim 1, wherein the second exposure start time is later than or substantially the first download end time minus a time point of the preset exposure period. The transmission interface of claim 1, wherein the first download start time to the first download end time; and the second download start time to the second download end time are a preset download Period, and The second exposure start time is later than or substantially equal to the first exposure start time plus the time point of the preset download period. The transmission interface of claim 1, wherein the sensing data comprises a first simulation segment and a data segment, and the index mark is added to the first simulation segment. The transmission interface of claim 5, wherein the sensing data further comprises a second simulation segment, and the data segment is between the first simulation segment and the second simulation segment. . The transmission interface of claim 1, further comprising: an assembly control board coupled between the signal mixing board and the host for encoding the control signal of the host, wherein the signal The mixing board further decodes the encoded control signal, and then transmits the decoded control signal to the signal input boards. A lens detecting device includes a plurality of sensing elements; a host; and a transmission interface coupled between the sensing elements and the host, comprising: a plurality of signal input boards coupled to the sensing elements, Controlling the sensing elements according to a control signal of the host, and downloading a plurality of sensing materials from the sensing elements; and The signal mixing board is coupled to the signal input boards, receives the sensing materials from the signal input boards at different times, and adds an index mark to each of the sensing materials, and the sensing signals are added The data is mixed, wherein the host receives the sensing materials including the index mark, and each of the sensing elements is a line sensing element, and the line sensing elements comprise a first line sensing element And a second line type sensing component, the signal input board includes: a first signal input board coupled to the first line type sensing element, and controlling the first line type sensing element to enable the After the first line sensing element is exposed between a first exposure start time and a first exposure end time, the first line type is downloaded between a first download start time and a first download end time. Sensing data of the sensing component; and a second signal input board coupled to the second line sensing element and controlling the second line sensing element to make the second line sensing element in a second Exposure start time to a second exposure end time After between exposures, a second start time to download between a second end of the download time, download the second Sensing data of the two-wire sensing element, and the second download initiation time is later than or substantially equal to the first download end time, the first exposure start time to the first exposure end time; and the second The exposure start time to the second exposure end time is a preset exposure period. The lens detecting device of claim 8, wherein the extending direction of one of the linear sensing elements is perpendicular to the extending direction of the other of the linear sensing elements. The lens detecting device of claim 8, wherein the second exposure start time is later than or substantially the first download end time minus a time point of the preset exposure period. The lens detecting device of claim 8, wherein the first download start time to the first download end time; and the second download start time to the second download end time are a preset During the download, and the second exposure start time is later than or substantially equal to the first exposure start time plus the time point of the preset download period. The lens detecting device of claim 8, wherein the host sends an abnormality notification signal according to the index marks of the received sensing materials.