Work fixture for measuring light transmittance of optical filter

Abstract

The invention relates to a work fixture for measuring light transmittance of an optical filter, which comprises a base with a dent, wherein a light source is arranged in the dent of the base; the opening of the base is provided with a mounting plate; the mounting plate is provided with a first light transmitting hole; the mounting plate is also provided with a pressure sheet for fixing the optical filter at the light transmitting hole; and the pressure plate is provided with a second light transmitting hole which facilitates light transmission of the optical filter. The work fixture provided with the light source, the optical filter mounting plate and the pressure sheet can be used for fixing the optical filter to be measured, thereby avoiding errors caused by dithering in hand-held measurement; and thus, the measurement of the luminous flux of the optical filter is more accurate, the manpower can be saved, and the measurement efficiency is enhanced.

Description

technical field [0001] The invention relates to the technical field of illumination, and more specifically relates to a fixture for measuring light transmittance of an optical filter. Background technique [0002] At present, when testing the transmittance of an optical filter, the optical filter is generally placed in front of the light source, and then the illuminance at a distance of 1 meter from the front of the light source is measured, and then compared with the illuminance of the light source at the same position without an optical filter, the obtained The ratio is the transmittance of the filter. The average value can be obtained by taking multiple measurements in sequence to improve the measurement accuracy. [0003] Since there is no special fixture for testing the transmittance of the filter, the filter can only be held by hand, but if the hand shakes, it cannot be guaranteed that the filter is at the same distance from the light source every time , so the resul...

AI Technical Summary

Problems solved by technology

[0003] Since there is no special fixture for testing the transmittance of the filter, the filter can only be held by hand, but if the hand shakes, it cannot be guaranteed that the filter is at the same distance from the light source every time , so the results of different times of testing the same filter are very different, and the true transmittance of the filter cannot be accurately tested

[0004] Moreover, since the illuminance meter for measuring illuminance generally measures the illuminance of a point, if the light emitted by the test light source is too scattered, the measurement accuracy will not be high.

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