Fixed light source type full space distribution photometer

Abstract

The invention provides a fixed light source-type full space distribution luminosity measurement instrument. The luminosity measurement instrument comprises a base, a vertical rotating mechanism, a vertical U-shaped rotating arm, a horizontal rotating mechanism, a horizontal U-shaped rotating arm, a to-be-measured light source correcting bracket, a positioning laser and a light detector, wherein the vertical rotating mechanism is arranged on the base; the vertical U-shaped rotating arm consists of a beam and two arms and is fixed to the vertical rotating mechanism; the horizontal rotating mechanism is arranged inside the two arms of the vertical U-shaped rotating arm; the horizontal U-shaped rotating arm consists of a beam and two arms, and the two arms of the horizontal U-shaped rotating arm are connected with the horizontal rotating mechanism; one end of the to-be-measured light source correcting bracket is fixed in the center of the beam of the vertical U-shaped rotating arm, and the other end of the to-be-measured light source correcting bracket is suitable for holding a to-be-measured light source; the positioning laser is fixed to the horizontal U-shaped rotating arm, and the positioning laser and the horizontal rotating mechanism are in the same axis; the light detector is fixed in the center of the beam of the horizontal U-shaped rotating arm; the central lines of the light detector and the to-be-measured light source correcting bracket are in the same vertical plane. Through the adoption of the novel conception on the structure, the measurement precision can be improved effectively.

Description

technical field [0001] The invention relates to a fixed light source type full-space distribution photometric tester, which is used to measure the luminous flux and luminous intensity of various light sources and lamps, such as various types of vehicle lamps in fixed installation positions, and floodlights that need to be installed at a fixed angle. The distribution and light color distribution are precisely measured in the near field and in the whole space. Background technique [0002] For the measurement of distributed luminosity, illuminance measurement is generally used to measure the luminous flux and light intensity distribution of light sources or lamps, and a spectrometer is used to measure light color distribution. During measurement, the illuminance distribution of the simulated spherical surface centered on the measured light source is measured, the total luminous flux of the measured light source is calculated by numerical integration, and the light intensity of...

AI Technical Summary

Problems solved by technology

Although the non-full space goniophotometer with fixed light source can ensure that the position of the light source under test remains unchanged, the rotating arm with the photodetector is blocked by the suspension device of the light source under test during the test, and cannot be rotated to each side of the suspension device for about With an included angle range of 30 degrees, it is impossible to complete the measurement of the whole space, and the luminous flux cannot be measured. The tested light intensity and light color distribution are the conclusions of the partial space.

In addition to the above defects, neither of the two goniophotometers can accurately adjust and position the spatial position of the measured light source

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