CN210270474U

CN210270474U - Large-view-field uniform light source system

Info

Publication number: CN210270474U
Application number: CN201921229501.1U
Authority: CN
Inventors: 张世伟; 吴凯
Original assignee: Weipu Optoelectronics (shanghai) Co Ltd
Current assignee: Weipu Optoelectronics (shanghai) Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-04-07
Anticipated expiration: 2029-07-31

Abstract

The utility model relates to a big even light source system in visual field combines polylith LED area array lamp plate and spherical diffuser plate to realize big visual field even light source outgoing, compact structure, small, the degree of consistency is high, and wherein, LED area array lamp plate contains the lamp pearl of the different peak wavelength of a plurality of passageways or colour temperature, realizes the regulation of colour temperature and luminance, and spherical diffuser plate adopts high diffuse reflection optical material to realize even light, and the angle that covers exceeds 180, combines control software can realize the recalibration of light source simultaneously.

Description

Large-view-field uniform light source system

Technical Field

The present invention relates to camera and sensor calibration, and more particularly to a large field of view uniform light source system.

Background

With the development of technology, cameras have been integrated into various personal and industrial devices, including mobile phones, automobiles, security, smart homes, industrial devices, and the like. In some application scenarios, cameras with large field angles are also widely applied, especially in the automobile and security camera industries. At present, the field angle of a large-field-angle camera is 140 degrees and 180 degrees, and the maximum field angle is even 220 degrees. After the camera module with a large field angle is assembled, corresponding flat field correction, white balance correction and the like are required, and a large-field-of-view uniform light source is required at the moment.

The traditional plane uniform light source generally has better uniformity within a 120-degree field range, and obviously cannot meet the correction requirement of a camera with a large field angle. In the market, a large-view-field uniform light source system of integrating spheres is also available at present, but the light source system based on the integrating spheres has large volume, complex structure and high cost, and is not suitable for large-scale application to large-view-field angle module correction of a production line end.

SUMMERY OF THE UTILITY MODEL

In order to overcome not enough among the background art, the utility model discloses a big even light source system of visual field has adopted the design of class integrating sphere, including a plurality of passageway LED lamp pearls, spherical diffuser plate, LED drive electrical apparatus, control circuit, mechanical housing, control software and measuring equipment. The utility model has the advantages of simple structure, compact volume, and covering angle of field of more than 180 degrees, and overcomes the defects of integrating sphere light source such as large volume, complex structure, high cost, etc.

The technical scheme of the utility model is as follows:

the utility model provides a big even light source system of visual field which characterized in that, includes multichannel LED lamp pearl, spherical diffuser plate, LED drive electrical apparatus, control circuit, mechanical housing and control software.

According to the large-visual-field uniform light source system, the LED lamp bead part comprises 2-10 channels and lamp beads with different peak wavelengths or color temperatures covering ultraviolet light, visible light, infrared spectrum or combination.

A big even light source system in visual field, LED lamp pearl part comprises 5 surface array formula lamp plates to fix on mechanical housing.

According to the large-view-field uniform light source system, the shape diffusion plate is made of high-diffuse-reflection semi-transparent optical materials, so that a light-homogenizing effect is achieved, and uniformity of a light-emitting surface is guaranteed.

In the large-field-of-view uniform light source system, the angle covered by the spherical diffusion plate exceeds 180 degrees.

According to the large-visual-field uniform light source system, the LED driving part realizes that each channel of LED lamp beads has 8-bit, 10-bit, 12-bit or 16-bit brightness adjusting ranges, and the driving mode comprises Amplitude Modulation (AM), Pulse Width Modulation (PWM) or the combination of the two modulation modes. The color temperature and the brightness are adjusted by adjusting the brightness of the LED lamp beads in different channels to mix light.

According to the large-visual-field uniform light source system, the LED control part realizes single-machine control over the pre-stored light source, and the LED control part comprises a communication interface and is communicated with a control software end.

A big even light source system in visual field, mechanical housing fixes LED lamp plate, spherical diffuser plate, and mechanical housing board fixed edge department has the light leak of preventing to handle.

According to the large-view-field uniform light source system, control software is used for controlling the whole light source, adjusting the color temperature and the brightness, and the light source is calibrated through external measuring equipment.

Through the above disclosure, the beneficial effects of the utility model are:

this practicality combines polylith LED area array formula lamp plate and spherical diffuser plate to realize the even light source outgoing in big visual field, compact structure, small, the degree of consistency is high, and wherein, LED area array formula lamp plate contains the lamp pearl of the different peak wavelength of a plurality of passageways or colour temperature, realizes the regulation of colour temperature and luminance. The spherical diffusion plate is made of high-diffuse-reflection optical materials to realize uniform light, the covered angle exceeds 180 degrees, and meanwhile, the recalibration of the light source can be realized by combining control software.

Drawings

FIG. 1 is an embodiment light source module;

FIG. 2 is an exploded view of an embodiment light source module;

FIG. 3 is a diagram illustrating the coverage angle of a spherical diffuser plate of a light source module according to an embodiment;

FIG. 4 is an embodiment control box;

FIG. 5 is a diagram of an embodiment control software calibrating light source settings.

Detailed Description

The present invention will be further described with reference to the following examples; the following examples are not intended to limit the present invention, and any equivalent structural substitutions within the technical framework disclosed in the present invention are all the protection scope of the present invention, only as a means for supporting the realization of the present invention;

fig. 1 is an overall schematic view of the light source module, which is an overall schematic view after all components are assembled.

Fig. 2 shows an exploded view of a light source module, which includes five lamp panels 1, a mechanical rear panel 2, a mechanical left and right panels 3, fixing ears 4, a mechanical upper panel including a handle 5, a mechanical bottom panel 6, a mechanical front panel 7, and a spherical diffusion panel 8.

The five lamp panels 1 are respectively fixed to a mechanical rear plate 2, a mechanical left plate 3, a mechanical right plate 3, a mechanical upper plate 5 and a mechanical bottom plate 6 through screws; the fixing ears 4 are fixed on the left and right mechanical plates 3 through screws, the fixing ears 4 can be provided with a bracket for fixing the test camera to face the spherical center of the spherical diffusion plate 8, and the fixing ears 4 are convenient for fixing the light source to the whole test machine table; the mechanical upper plate 5 is provided with a fixed handle, so that a user can carry the mechanical upper plate conveniently at any time; the spherical diffusion plate 8 is fixed on the mechanical front plate 7, the spherical diffusion plate 8 is made of resin high diffuse scattering materials, the size of the spherical diffusion plate is large and semi-spherical, the spherical diffusion plate covers 220 degrees, and as shown in figure 3, the correction requirements of most of large-field-angle cameras in the market are met; the LED lamp panel 1 comprises four LED channels of a low color temperature LED, a high color temperature LED, a blue light LED and a near infrared IR 940nm lamp bead, the combination output of different color temperatures, different brightness, visible light and IR light and the like is realized by mixing light, and the four lamp beads are uniformly combined into a module to be paved on the whole LED lamp panel; the reverse side of the mechanical front plate 7 can be pasted with a high-reflection sticker or coating to enable the inner cavity of the whole light source to form a closed space for light mixing, and the uniform light output of the light-emitting surface is formed by combining the spherical diffusion plate.

The LED drive adopts 12-bit single LED channel brightness adjustment, namely each LED channel has 4096-level brightness steps, the LED control part can communicate with computer software to execute control software commands, the color temperature adjustment of 2700-.

Fig. 5 shows that the control software implements the calibration settings for the light source by means of the measuring device. The measuring equipment is placed right above the light emitting surface of the light source and connected with the computer end; the control box is connected with the light source module; the control box is connected with the computer end.

The detailed part of this application is the prior art.

Claims

1. A large-field-of-view uniform light source system is characterized by comprising a multi-channel LED lamp bead, a spherical diffusion plate, an LED driving circuit, a control circuit, a mechanical shell and control software, wherein the multi-channel LED lamp bead is composed of 5 panel array lamp panels and is fixed on the mechanical shell; the LED lamp panel and the spherical diffusion plate are fixed by the mechanical shell, and a closed light mixing cavity is formed by combining the mechanical shell to realize high-uniformity light output of a light emitting surface; the LED drive circuit and the control circuit part are positioned in the control box and are connected with the light source module.

2. The large field of view uniform light source system of claim 1, wherein said LED lamp bead portion comprises 2-10 channels of lamp beads.

3. The system according to claim 1, wherein the spherical diffuser plate is made of a high-diffuse-reflectance semi-transparent optical material.

4. The system of claim 1, wherein the angle covered by the spherical diffuser plate is more than 180 °.

5. The system of claim 1, wherein the LED driving portion implements an 8-bit, 10-bit, 12-bit or 16-bit brightness adjustment range for each channel of LED lamp beads, and the driving method includes amplitude modulation, pulse width modulation or a combination of two modulation methods, and the color temperature and brightness adjustment is implemented by adjusting the brightness of the different channels of LED lamp beads to mix light.

6. The system of claim 1, wherein the LED control circuit implements stand-alone control of the pre-stored light source and comprises a communication interface for communicating with a control software terminal.

7. The system of claim 1, wherein the control software implements control, color temperature adjustment, brightness adjustment of the whole light source, and calibration of the light source via an external measuring device.