CN115856848A

CN115856848A - Automatic testing device for optical current of flat window TO

Info

Publication number: CN115856848A
Application number: CN202310021291.1A
Authority: CN
Inventors: 袁超; 方成诚; 廖世容
Original assignee: Zhejiang Guangte Technology Co ltd
Current assignee: Zhejiang Guangte Technology Co ltd
Priority date: 2023-01-07
Filing date: 2023-01-07
Publication date: 2023-03-28

Abstract

The invention relates TO the technical field of semiconductors, in particular TO a photocurrent automatic testing device of a flat window TO, which comprises a light source, an optical fiber, a collimator, a digital source meter and an upper computer; the input end of the optical fiber is connected with the light source, the output end of the optical fiber is connected with the collimator, and the output end of the collimator corresponds TO the photosensitive surface of the flat window TO; the signal output end of the flat window TO signal is connected with a digital source meter, and the digital source meter and a light source signal are connected with an upper computer; light of the light source is transmitted TO the photosensitive surface of the flat window TO through the optical fiber and the collimator, the photosensitive surface of the flat window TO is coupled TO find light, the maximum photocurrent is obtained through the digital source meter and then is uploaded TO an upper computer, and automatic test of the TO photocurrent of the flat window is completed. The invention ensures the production efficiency, the test accuracy and the product quality.

Description

Automatic testing device for optical current of flat window TO

Technical Field

The invention relates TO the technical field of semiconductors, in particular TO a photocurrent automatic testing device for a flat window TO.

Background

With the increase of the requirements of application scenes such as laser radars and the like, the flat window TO (Transistor Outline) package is increased; the photocurrent is a key parameter of the TO of the receiving end, and the normal performance of the product can be ensured only through testing;

at present, the conventional lens packaging TO uses a conventional standard single-mode fiber TO align a lens for photocurrent testing, and has manual or automatic functions, referring TO fig. 2 and 3, a conventional standard single-mode fiber facula divergence condition can occur in a flat window TO scene when a fiber facula used for the automatic testing of the conventional lens tube cap TO, the facula divergence easily reaches the outside of a photosurface, and the accurate photocurrent can be measured only when the facula reaches the photosurface; therefore, the problems of low coupling efficiency and small photocurrent caused by light spot divergence occur, the TO response current of the flat window cannot be accurately measured, and the TO photocurrent test requirement of the flat window cannot be met.

Disclosure of Invention

The invention aims TO provide an automatic photocurrent testing device of a flat window TO, which ensures the production efficiency, the testing accuracy and the product quality.

In order to solve the technical problems, the technical scheme of the invention is as follows: automatic testing arrangement of photocurrent of flat window TO includes:

the system comprises a light source, an optical fiber, a collimator, a digital source meter and an upper computer; the input end of the optical fiber is connected with the light source, the output end of the optical fiber is connected with the collimator, and the output end of the collimator corresponds TO the photosensitive surface of the flat window TO; the signal output end of the flat window TO signal is connected with a digital source meter, and the digital source meter and a light source signal are connected with an upper computer;

light of the light source is transmitted TO the photosensitive surface of the flat window TO through the optical fiber and the collimator, the photosensitive surface of the flat window TO is coupled TO find light, the maximum photocurrent is obtained through the digital source meter and then is uploaded TO an upper computer, and automatic test of the TO photocurrent of the flat window is completed.

Furthermore, the light finding mode adopts a climbing method or a Chinese character hui method to couple the light finding.

Further, the testing device also comprises a clamp which is used for clamping the collimator.

Further, the collimator adopts a collimator with large working distance and spot diameter matched with a product to be measured.

Further, the clamp is an at least three-axis clamp.

Further, the testing device also comprises a testing board, and the testing board is used for mounting the flat window TO.

Further, the test device further comprises: light attenuation and light switching; the output end of the light source is connected with the collimator through the optical fiber after light attenuation and the optical switch.

The invention has the following beneficial effects:

the invention replaces the conventional standard single mode fiber, arranges the collimator, ensures that the light spot is not basically diffused in a certain range, and is easy TO hit on the photosensitive surface of the flat window TO, thereby achieving the purpose of maximizing the photocurrent; the invention fills the technical blank at present, improves the testing efficiency, consistency, accuracy and quality assurance, and is beneficial to batch production.

Drawings

FIG. 1 is a schematic structural diagram of a testing apparatus according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating the spot divergence of a standard single mode fiber in the prior art;

FIG. 3 is a schematic diagram of alignment of a standard single mode fiber spot with a flat window TO photosurface in the prior art;

FIG. 4 is a schematic diagram of the single-mode fiber flare with a collimator according to the present invention;

FIG. 5 is a schematic view of another installation of the testing device according to the first embodiment;

FIG. 6 is a schematic structural diagram of a test board according to an embodiment;

fig. 7 is a schematic structural diagram of a second testing apparatus according to an embodiment of the invention.

Description of the drawings: 1. a light source; 2. an optical fiber; 3. a collimator; 4. a digital source meter; 5. an upper computer; 6. a flat window TO; 601. a photosensitive surface; 7. a clamp; 8. a test board; 801. a slot; A. (ii) a divergent light; 9. light attenuation; 10. an optical switch.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The first embodiment is as follows:

referring TO fig. 1 and 4, the present invention is an automatic testing apparatus for photocurrent of a flat window TO, which includes: the device comprises a light source 1, an optical fiber 2, a collimator 3, a digital source meter 4, an upper computer 5, a clamp 7 and a test board 8;

the input end of the optical fiber 2 is connected with the light source 1, the output end of the optical fiber 2 is connected with the collimator 3, and the output end of the collimator 3 corresponds TO the photosensitive surface 601 of the flat window TO 6; the signal output end of the flat window TO6 is connected with the digital source meter 4 through a signal, and the digital source meter 4 and the light source 1 are connected with the upper computer 5 through signals;

light A diffused by the light source 1 is emitted TO a photosensitive surface 601 of the flat window TO6 through the optical fiber 2 and the collimator 3, and referring TO fig. 4, the collimator 3 outputs light TO enable light spots not TO be diffused in a certain range, and meanwhile the light spots can be uniformly distributed on the photosensitive surface 601 of the chip in the flat window TO6. The maximum photocurrent is obtained by coupling and light finding through a climbing method or a Chinese character 'hui' method and is uploaded TO the upper computer 5 after being obtained through the digital source meter 4, so that the automatic test of the TO6 photocurrent of the flat window is completed, the test process is automatically completed, the operation is convenient, and the accuracy and the consistency of the test result are guaranteed.

Referring TO fig. 1 and 5, the collimator 3 is mounted on the upper or left and right sides of the flat window TO6 device by a jig 7, and the flat window TO6 is mounted on the lower or left and right sides of the collimator 3 by a test board 8. The clamp 7 is used for clamping the collimator 3, the clamp 7 is at least a three-axis clamp, and a six-axis clamp can be selected, and the clamp 7 is the prior art and is not described herein again. The collimator 3 is the collimator 3 with a large working distance and a light spot diameter matched with a product TO be detected, and the collimator 3 with the large working distance can reserve enough safety space between the clamp 7 and the flat window TO6 TO avoid damage caused by the clamp 7 touching the TO. Wherein, the specific needs of working distance match the test demand, and the frequency of use is great at present 2mm working distance, 10um facula, specifically can select according to the use scene, as follows is some common combinations:

the test board 8 is a printed board, and one flat window TO6 or a plurality of flat windows TO6 can be mounted on the test board 8. Referring TO fig. 6, the test board 8 has a plurality of sets of slots 801 for connecting signal lines of the flat windows TO6, each set of slots 801 is for connecting one of the flat windows TO6, and at least two pins are respectively connected TO the signal lines of the flat windows TO6 in one set of slots. The two pins shown in fig. 6 are respectively and correspondingly connected with the digital source meter 4, when the flat windows TO6 connected TO the first group of slots 801 are tested, the clamp 7 drives the collimator 3 TO irradiate light on the first flat window TO6, the digital source meter 4 obtains photocurrent data of the first flat window TO6, and similarly, the next flat window TO6 test is performed. The current is measured by a digital source meter 4, and then the upper computer 5 communicates to obtain and store the test value.

Example two:

the difference between this embodiment and the first embodiment is: on the basis of the first embodiment, the testing apparatus of the present embodiment further includes: light attenuation and light switching.

Referring TO fig. 7, the present embodiment provides an automatic photocurrent testing apparatus for a flat window TO, which includes: the device comprises a light source 1, an optical fiber 2, a light attenuation 9, an optical switch 10, a collimator 3, a digital source meter 4, an upper computer 5, a clamp 7 and a test board 8;

one end of the optical fiber 2 is connected with the output end of the light source 1, the other end of the optical fiber 2 is sequentially connected with the collimator 3 after being subjected TO light attenuation 9 and the optical switch 10, and the output end of the collimator 3 corresponds TO the photosensitive surface 601 of the flat window TO 6; the signal output end of the flat window TO6 is connected with the digital source meter 4 through a signal, and the digital source meter 4, the light source 1, the light attenuation 9 and the optical switch 10 are connected with the upper computer 5 through signals;

the light of the light source 1 is transmitted TO the photosensitive surface 601 of the flat window TO6 through the optical fiber 2, the light attenuation 9, the optical switch 10 and the collimator 3, the photosensitive surface 601 of the flat window TO6 is coupled TO find the light, the maximum light current is obtained through the digital source meter 4 and then is uploaded TO the upper computer 5, and the automatic light current test of the flat window TO6 is completed.

In this embodiment, the light attenuation 9 product is the prior art, and the main function is to independently select the optical power to be output by the collimator 3 according to different scenes, so that the whole test equipment has wider applicability and more convenient use, the common specifications of light attenuation include working wavelength, attenuation range, attenuation precision and the like, and common manufacturers include pussels, galbant and the like. The optical switch 10 is a conventional one, and has a main function of cutting off or opening a light path of a test system, and when the photocurrent is not required to be tested, the optical switch is opened, and when the photocurrent is required to be tested, the optical switch is closed, so that the test equipment can be more flexible, common specification parameters include wavelength, insertion loss, return loss and the like, and common manufacturers include pussel, kalite and the like.

The parts not involved in the present invention are the same as or implemented using the prior art.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. Automatic testing arrangement of photocurrent of flat window TO, its characterized in that: comprises that

The device comprises a light source (1), an optical fiber (2), a collimator (3), a digital source meter (4) and an upper computer (5); the input end of the optical fiber (2) is connected TO the light source (1), the output end of the optical fiber (2) is connected TO the collimator (3), and the output end of the collimator (3) corresponds TO the photosensitive surface (601) of the flat window TO (6); the signal output end of the flat window TO (6) is connected with the digital source meter (4) through signals, and the digital source meter (4) and the light source (1) are connected with the upper computer (5) through signals;

light of the light source (1) is transmitted TO a photosensitive surface (601) of the flat window TO (6) through the optical fiber (2) and the collimator (3), the photosensitive surface (601) of the flat window TO (6) is coupled TO find light, the maximum light current is obtained through the digital source meter (4) and then is uploaded TO the upper computer (5), and automatic light current test of the flat window TO (6) is completed.

2. The automatic photocurrent testing device of a flat window TO as claimed in claim 1, wherein: the light finding mode adopts a climbing method or a Chinese character hui type method for coupling light finding.

3. The automatic photocurrent testing device of a flat window TO as claimed in claim 1, wherein: the testing device further comprises a clamp (7), and the clamp (7) is used for clamping the collimator (3).

4. The automatic photocurrent testing device of a flat window TO as claimed in claim 1, wherein: the collimator (3) adopts a collimator with large working distance and spot diameter matched with a product to be measured.

5. The automatic photocurrent testing device of the flat window TO as claimed in claim 3, wherein: the clamp (7) is an at least triaxial clamp.

6. The photocurrent automatic testing device of the flat window TO as claimed in claim 1, wherein: the testing device further comprises a testing board (8), and the testing board (8) is used for mounting the flat window TO (6).

7. The automatic photocurrent testing device of a flat window TO as claimed in claim 1, wherein: the test device further comprises: a light attenuation (9) and a light switch (10);

the output end of the light source (1) is connected with the collimator (3) through the optical fiber (2) after passing through the light attenuation (9) and the optical switch (10).