CN109990978B

CN109990978B - Detection equipment for IR wavelength of lens

Info

Publication number: CN109990978B
Application number: CN201910286263.6A
Authority: CN
Inventors: 陈太盛; 李韶茂
Original assignee: Shenzhen Jinshida Photoelectric Co ltd
Current assignee: Shenzhen Jinshida Photoelectric Co ltd
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2022-03-25
Anticipated expiration: 2039-04-10
Also published as: CN109990978A

Abstract

A detection device for IR wavelength of a lens comprises a base, a mounting rack, a laser generator, an adjusting knob, a controller, a receiver, a clamp and a lens to be detected; the laser generator is arranged at the top of the mounting rack and emits laser vertically downwards; the adjusting knob is arranged on the mounting rack and positioned on one side of the laser generator; the clamp is arranged on the base, and an opening through which laser can pass is formed in the clamp; placing a lens to be detected on a clamp, wherein an IR color filter is arranged inside the lens to be detected; a receiver is arranged inside the mounting rack; a signal converter is arranged in the receiver; the controller is arranged on the mounting frame; the controller is provided with a buzzer, an indicator light and a processor; the controller is in control connection with the buzzer and the indicator lamp; the method has simple operation steps, greatly improves the working efficiency, ensures the quality of the finished lens product, accurately detects the wavelength of the IR color filter in time and determines whether the IR color filter mixed with different wavelengths exists.

Description

Detection equipment for IR wavelength of lens

Technical Field

The invention relates to the technical field of optical lenses, in particular to a device for detecting IR wavelength of a lens.

Background

The infrared filter (IR filter) is mainly applied to the field of security monitoring, infrared gas analyzers, night vision products, infrared detectors, infrared receivers, infrared induction and infrared communication products. Specific to products such as: the system comprises a monitoring camera, a remote controller, an infrared curtain wall product, an infrared induction closestool, a water faucet, a hand sanitizer device, an infrared temperature measurer, an infrared printer, an interactive electronic whiteboard, an infrared touch screen, a fingerprint identification machine, a face identification system and the like; the wavelength of the existing detection lens IR (optical filter) is determined by an electronic module (CCD or COMS) to actually shoot images, and in the actual detection process, the efficiency is low, the detection process is complicated and misjudgment is easily caused, and the detection efficiency is influenced.

In order to solve the above problems, the present application provides a lens IR wavelength detection device.

Disclosure of Invention

Objects of the invention

The invention provides a device for detecting the wavelength of a lens IR (optical color filter), which aims to solve the technical problems that the wavelength of the existing detecting lens IR (optical color filter) in the background technology is determined by using an electronic module (CCD or COMS) to actually shoot images, the efficiency is low, the detecting process is complicated and is easy to make misjudgments in the actual detecting process, and the detecting efficiency is influenced.

(II) technical scheme

In order to solve the problems, the invention provides a device for detecting the IR wavelength of a lens, which comprises a base, a mounting rack, a laser generator, an adjusting knob, a controller, a receiver, a clamp and a lens to be detected, wherein the base is provided with a plurality of fixing holes; the laser generator is arranged at the top of the mounting rack and emits laser vertically downwards; the adjusting knob is arranged on the mounting frame and positioned on one side of the laser generator and used for adjusting the wavelength of laser emitted by the laser generator; the clamp is arranged on the base, and an opening through which laser can pass is formed in the clamp; placing a lens to be detected on a clamp, wherein an IR color filter is arranged inside the lens to be detected; the lens to be detected is vertical to the laser emitted by the laser generator; a receiver is arranged in the mounting rack, is positioned below the lens to be detected and is positioned on the same straight line with the lens to be detected and the laser generator; the laser signal receiving module is used for receiving a laser signal emitted by a laser generator; the receiver is internally provided with a signal converter which is used for converting the received laser signal into a pulse signal; the controller is arranged on the mounting frame and is electrically connected with an external power supply; the controller is provided with a buzzer, an indicator light and a processor; the processor is in communication connection with a signal converter inside the receiver through a signal wire and is used for receiving the pulse signal generated by the signal converter; the controller is in control connection with the buzzer and the indicator lamp and is used for controlling the buzzer and the indicator lamp to be started or closed.

Preferably, the laser generator is an infrared semiconductor laser; the laser generator is provided with optical coated glass or plastic lenses.

Preferably, the laser generator emits laser light in the wavelength range of 850-940 nm.

Preferably, the receiver is a photodiode.

Preferably, the indicator light has three indicating colors of red, yellow and green.

Preferably, the mounting frame is made of an aluminum alloy material.

Preferably, the signal line is an electromagnetic shield line.

The technical scheme of the invention has the following beneficial technical effects: according to the invention, the laser generator is arranged on the mounting frame, and the laser generator is kept to emit laser vertically downwards; installing a lens to be detected on a clamp and fixing the lens to be detected tightly, keeping the laser generator, the lens to be detected and a receiver installed in a base on the same straight line, and then rotating an adjusting knob according to the wavelength of an IR color filter marked on the lens to be detected to enable the laser generator to emit laser with corresponding wavelength; for example, if the wavelength of the IR color filter mark is 850nm, the adjusting knob is rotated to adjust the output wavelength of the laser generator to 850 nm; when laser passes through the lens, due to the property of the IR (only light in the same wave band is allowed to pass through, and other wave bands are blocked), a corresponding laser signal can be obtained on the receiver, the signal converter converts the laser signal into pulse signals with different frequencies according to the energy of the received laser signal, the pulse signals are sent to the processor, and the processor is compared with a preset threshold value to judge whether the wavelength of the IR color filter is the same as that of the laser generator or not, so that the condition that the lens has no wrong IR color filter or poor material mixing is determined; when the wavelength of the IR color filter is the same as the wavelength emitted by the laser generator, the indicator lamp lights a green light; when the wavelength of the IR color filter is different from the wavelength emitted by the laser generator, the buzzer alarms and the indicator lamp lights the red light; the method has simple operation steps, greatly improves the working efficiency, ensures the quality of the finished lens product, accurately detects the wavelength of the IR color filter in time and determines whether the IR color filter mixed with different wavelengths exists.

Drawings

Fig. 1 is a schematic diagram of the working principle of the device for detecting IR wavelength of lens according to the present invention.

Fig. 2 is a signal connection diagram of the detection device for the IR wavelength of the lens according to the present invention.

Reference numerals: 1. a mounting frame; 2. a laser generator; 3. adjusting a knob; 4. a lens to be detected; 5. an IR color filter; 6. a clamp; 7. a base; 8. a receiver; 801. a signal converter; 9. a controller; 901. a buzzer; 902. an indicator light; 903. a processor.

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 in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1-2, the device for detecting IR wavelength of a lens according to the present invention includes a base 7, a mounting frame 1, a laser generator 2, an adjusting knob 3, a controller 9, a receiver 8, a clamp 6, and a lens 4 to be detected;

the laser generator 2 is arranged at the top of the mounting frame 1, and the laser generator 2 emits laser vertically downwards; the adjusting knob 3 is arranged on the mounting rack 1 and positioned on one side of the laser generator 2 and is used for adjusting the wavelength of the laser emitted by the laser generator 2;

the clamp 6 is arranged on the base 7, and an opening through which laser can pass is formed in the clamp 6; the lens 4 to be detected is placed on the clamp 6, and an IR color filter 5 is arranged inside the lens 4 to be detected; the lens 4 to be detected is vertical to the laser emitted by the laser generator 2;

a receiver 8 is arranged in the mounting rack 1, the receiver 8 is positioned below the lens 4 to be detected, and the receiver 8, the lens 4 to be detected and the laser generator 2 are positioned on the same straight line; for receiving the laser signal emitted by the laser generator 2; a signal converter 801 is arranged inside the receiver 8 and is used for converting the received laser signal into a pulse signal;

the controller 9 is arranged on the mounting rack 1, and the controller 9 is electrically connected with an external power supply; the controller 9 is provided with a buzzer 901, an indicator light 902 and a processor 903; the processor 903 is in communication connection with the signal converter 801 inside the receiver 8 through a signal line, and is used for receiving the pulse signal generated by the signal converter 801; the controller 9 is in control connection with the buzzer 901 and the indicator lamp 902, and is used for controlling the buzzer 901 and the indicator lamp 902 to be turned on or off.

According to the invention, the laser generator 2 is arranged on the mounting frame 1, and the laser generator 2 is kept emitting laser vertically downwards; installing a lens 7 to be detected on a clamp 6, fixing tightly, keeping the laser generator 2, the lens 7 to be detected and a receiver 8 arranged in a base 4 on the same straight line, and then rotating an adjusting knob 3 according to the wavelength of an IR color filter 5 marked on the lens 7 to be detected to enable the laser generator 2 to emit laser with corresponding wavelength; for example, if the wavelength marked by the IR color filter 5 is 850nm, the output wavelength of the laser generator 2 is adjusted to 850nm by rotating the adjusting knob 3; when laser passes through the lens, due to the property of the IR filter 5 itself (only allowing light in the same wavelength band to pass through, and other wavelength bands to be blocked), a corresponding laser signal can be obtained on the receiver 8, the signal converter 801 converts the received laser signal into a pulse signal with different frequency according to the energy of the received laser signal, and sends the pulse signal to the processor 803, and the processor 803 compares the received laser signal with a preset threshold value to judge whether the wavelength of the IR filter 5 is the same as the wavelength emitted by the laser generator 2, thereby determining whether the lens has a wrong IR filter 5 or poor mixing; when the wavelength of the IR filter 5 is the same as the wavelength emitted from the laser generator 2, the indicator lamp 902 turns on green; when the wavelength of the IR color filter 5 is different from the wavelength emitted by the laser generator 2, the buzzer 901 alarms and the indicator 902 lights up a red light; the method has simple operation steps, greatly improves the working efficiency, ensures the quality of the finished lens product, accurately detects the wavelength of the IR color filter 5 in time and determines whether the IR color filter 5 mixed with different wavelengths exists.

In an alternative embodiment, the laser generator 2 is an infrared semiconductor laser; the laser generator 2 is provided with optical coated glass or plastic lens, which plays a role in protecting the laser generator 2.

In an alternative embodiment, the laser generator 2 emits laser light in the wavelength range of 850-.

In an alternative embodiment, the receiver 8 is a photodiode to facilitate reception of the laser signal emitted by the laser generator 2.

In an alternative embodiment, the indicator light 902 has three indication colors of red, yellow, and green, and the red color of the indicator light 902 indicates that the wavelength of the IR filter 5 is different from the wavelength emitted by the laser generator 2; the indicator light 902 is bright yellow to indicate that the device is in a standby state; the green illumination of the indicator light 902 indicates that the wavelength of the IR filter 5 is the same as the wavelength emitted by the laser generator 2.

In an alternative embodiment, the mounting bracket 1 is made of an aluminum alloy material, which is strong and durable and has a good heat dissipation effect.

In an optional embodiment, the signal line is an electromagnetic shielding line, which effectively reduces crosstalk of external electromagnetic signals and prevents the final result from being influenced.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The device for detecting the IR wavelength of the lens is characterized by comprising a base (7), a mounting rack (1), a laser generator (2), an adjusting knob (3), a controller (9), a receiver (8), a clamp (6) and the lens (4) to be detected;

the laser generator (2) is arranged at the top of the mounting rack (1), and the laser generator (2) emits laser vertically downwards; the adjusting knob (3) is arranged on the mounting rack (1), is positioned on one side of the laser generator (2) and is used for adjusting the wavelength of laser emitted by the laser generator (2);

the clamp (6) is arranged on the base (7), and an opening through which laser can pass is formed in the clamp (6); the lens (4) to be detected is placed on the clamp (6), and an IR color filter (5) is arranged inside the lens (4) to be detected; the lens (4) to be detected is vertical to the laser emitted by the laser generator (2);

a receiver (8) is arranged in the mounting rack (1), the receiver (8) is positioned below the lens (4) to be detected, and the receiver (8), the lens (4) to be detected and the laser generator (2) are positioned on the same straight line; the laser signal receiving device is used for receiving a laser signal emitted by a laser generator (2); a signal converter (801) is arranged inside the receiver (8) and is used for converting the received laser signal into a pulse signal;

the controller (9) is arranged on the mounting rack (1), and the controller (9) is electrically connected with an external power supply; the controller (9) is provided with a buzzer (901), an indicator lamp (902) and a processor (903); the processor (903) is in communication connection with a signal converter (801) inside the receiver (8) through a signal line and is used for receiving the pulse signal generated by the signal converter (801); the controller (9) is in control connection with the buzzer (901) and the indicator lamp (902).

2. The lens IR wavelength detection device according to claim 1, wherein the laser generator (2) is an infrared semiconductor laser; the laser generator (2) is provided with optical coated glass or plastic lenses.

3. The device for detecting IR wavelength of a lens in accordance with claim 1, wherein the laser generator (2) emits laser light in the wavelength range of 850-940 nm.

4. Device for detection of lens IR wavelengths according to claim 1, characterized in that the receiver (8) is a photodiode.

5. The lens IR wavelength detection device according to claim 1, characterized in that the indicator light (902) has three indicator colors red, yellow and green.

6. The lens IR wavelength detection device according to claim 1, characterized in that the mounting frame (1) is made of aluminum alloy material.

7. The lens IR wavelength detection apparatus according to claim 1, wherein the signal line is an electromagnetic shield line.