A Spectral Response Test Device Outside the Response Band of a Solar-blind Ultraviolet Photocathode

Abstract

The invention discloses a device for testing spectral response outside a response waveband of a solar-blind UV photocathode. The device is mainly used for guiding the improvement of a photocathode manufacturing technology through a spectral response value outside the waveband. The device is characterized in that: A: a lamp box which is internally provided with a halogen lamp is connected with an optical filter box through a front connecting cylinder, two diaphragms are arranged in the front connecting cylinder, and a UV cut-off optical filter is arranged in the optical filter box; B, the optical filter box is connected with a dark box, a clamp is arranged in the dark box, a test diaphragm is arranged on the clamp, a tested object is placed behind the test diaphragm, and the solar-blind UV photocathode and a microchannel plate of the tested object are connected with a measurement power supply and are connected with a current meter in series. The application proves that the device can measure the spectral response value outside the waveband of the solar-blind UV photocathode, provides an objective basis for the improvement of the photocathode manufacturing technology, effectively improves and stabilizes performance quality of the photocathode, and satisfies the application technical requirements of products.

Description

technical field [0001] The invention relates to a test device in the manufacture of a solar-blind ultraviolet image intensifier and a solar-blind ultraviolet detector, [0002] Specifically, it is a test device for integral spectral response outside the response band of the sun-blind ultraviolet photocathode. The technical improvement of making photocathode is guided by the spectral response value outside the band. Background technique [0003] Ultraviolet rays usually refer to radiation with a wavelength in the range of 10-400nm. Among them, ultraviolet rays in the 200-280nm band are strongly absorbed and scattered by gases such as ozone in the atmosphere, making most of them unable to reach the surface of the earth. Therefore, ultraviolet rays in the 200-280nm band are in the The irradiance of the nearest ground is below 10 -13 W / m 2 , so this band is often called the solar-blind ultraviolet band. Currently used solar-blind UV image intensifiers and solar-blind UV dete...

AI Technical Summary

Problems solved by technology

Since the out-of-band spectral response of the cesium tellurium photocathode is very low, when measuring the lower spectral response, a higher monochromatic incident light excitation and a lower weak current measurement meter are often required. If the power of the monochromatic incident light is strong , the generated photocurrent is large, and the current measurement can be accurate, but the power of the input light is strong, and it is easy to damage the photocathode and micro-channel plate in the solar-blind ultraviolet image intensifier and solar-blind ultraviolet detector, making the device scrapped

However, if the monochromatic incident light power is low, the generated photocurrent is small, and it is difficult to accurately measure the photocurrent value, and it is also impossible to accurately evaluate the out-of-band spectral response of the cesium tellurium photocathode.

Images