Device for detecting image sensor performance and use method thereof

An image sensor and image detection technology, which is applied in image communication, television, electrical components, etc., can solve the problems of complex scenes, incapable of quantitative measurement, and not intuitive enough

Active Publication Date: 2015-10-14
福州鑫图光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of complex scenes, slow processing of image data, complicated measurement process, incapable of quantitative measurement, and insufficient intuition in the image sensor performance comparison and testing methods

Method used

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  • Device for detecting image sensor performance and use method thereof
  • Device for detecting image sensor performance and use method thereof
  • Device for detecting image sensor performance and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] combine Figure 1-3 , a device for detecting the performance of an image sensor, comprising an adjustable optical attenuation sheet 2, a converging lens 4, a laser 1, a diffraction screen 3 and an adjustable ring 5, wherein the laser 1, the adjustable optical attenuation sheet 2, the diffraction The screen 3, the converging lens 4 and the adjustable ring 5 are sequentially fixed in the device, the right side of the adjustable ring 5 is provided with an image sensor 6, and the left end of the laser 1 is provided with a cable interface, and the power supply 11 is connected through a cable Electrically connected, so that the laser 1 emits monochromatic parallel light; by adjusting the power of the laser 1, the intensity of the parallel light emitted by the laser 1 can be adjusted, and accordingly, the light intensity of the diffraction pattern can be adjusted; by installing different attenuation ratios The adjustable light attenuating sheet 2 can also attenuate the intensi...

Embodiment 2

[0136] Such as figure 1 As shown, the present invention provides a device for detecting the performance of an image sensor and its use method. The structure and use method are the same as in Embodiment 1, wherein, firstly, the device is closely connected with the camera through the adjustable ring 5, and the The cable interface of the laser 1 is connected to the power supply 11 through a cable, and the laser 1 is turned on to emit monochromatic light. The monochromatic light passes through the adjustable light attenuation plate 2 to regulate the light intensity emitted by the laser 1, and the regulated parallel light reaches the Diffraction occurs on the diffraction screen 3, and the diffracted light beam is converged by the converging lens 4, passes through the adjustable ring 5, and reaches the surface of the calibration image sensor 6 or the image sensor 6 to be tested. Diffraction spots are clearly imaged.

[0137] In this embodiment, the diffraction screen 3 is selected ...

Embodiment 3

[0172] The parameter performance of camera three is measured on the device of the present invention, and its structure and usage method are the same as those in embodiment 1. The number of data bits of the image is 12 bits, and the maximum gray value that the image can achieve is 2 b -1=4095, according to the first case of calculating the full well capacity in embodiment 1, the gray value μ of a certain k-order diffraction spot y.k range of 0.891 (2 b -1)~0.909(2 b -1), calculated in this embodiment: 3648 ~ 3722, the gray value μ of the first-order diffraction spot of the diffraction image captured by the camera three is measured by software y·1 is 3648, within this range, so the calculation of the full well capacity is calculated using the first case, the background gray value μ y.dark is 150, the number of photons per one hundred square micrometers of the first-order diffraction spot per millisecond I 1 2252, the quantum effect η is 60%, and the single pixel area A is 10...

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Abstract

The present invention discloses a device for detecting image sensor performance and a use method thereof, belonging to the field of optical imaging. The method comprises the following steps that a device right side interface is connected to a left side interface of an image sensor external frame, a closed space which is not interfered by the outside is formed, a laser emits parallel light to go through an adjustable light attenuation sheet, the adjusted parallel light is irradiated to a diffraction screen with a hole to generate diffraction, the diffracted light goes through a converging lens to be focused to the image element surface of the image sensor to form a diffraction pattern, and finally an adjustable ring is adjusted to focus the diffraction pattern. Through the light intensity information of a calibrated diffraction spot, the various performance parameters of the image sensor can be quantitatively obtained. The disadvantages of long time consumption, complicated operation, complex scene, difficult analysis and the like of a traditional test and comparison method are overcome, and the invention provides the intuitive, simple, fast, small and portable image sensor performance testing and comparison device with qualitative and quantitative functions and without outside interference and the method thereof.

Description

technical field [0001] The invention relates to the field of optical imaging, in particular to a device and a method for detecting the performance of an image sensor. Background technique [0002] An image sensor, also known as a camera, is a device that converts photon signals into analog or digital signals, and finally displays the data in the form of images or spectra. To evaluate the quality of a camera, many basic performance parameters need to be considered, including readout noise, absolute sensitivity threshold of photoresponse, full well capacity, dynamic range, signal-to-noise ratio, etc. EMVA 1288 is a standard test method issued by the European Machine Vision Association for measuring the basic performance parameters of these image sensors - in a rigorous test environment (completely shielded from external light, a uniform monochromatic light source generated by an integrating sphere, fixed image sensors using It is an optical platform that is strictly orthogona...

Claims

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Application Information

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IPC IPC(8): H04N17/00
Inventor 陈兵庄阿伟
Owner 福州鑫图光电有限公司
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