Brightness generator

A generator and brightness technology, applied in the field of optical radiation measurement, can solve the problems that the irradiance/radiance at the exit window of the brightness source cannot be completely uniform, the uniformity and color temperature stability are difficult to guarantee, and the light source is unstable. To achieve the effect of ensuring uniformity and adjustability, stable color temperature and high reliability

Active Publication Date: 2013-04-10
HANGZHOU EVERFINE PHOTO E INFO
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Problems solved by technology

However, due to the instability of the light source, the mechanical defects of the integrating sphere itself, and the uneven coating, the irradiance / radiance at the exit window of the existing integrating sphere brightness source cannot be completely uniform, especially when the integrating sphere When the diameter of the light outlet is relatively large
Moreover, uniformity and color temperature stability are difficult to guarantee when adjusting the output irradiance / radiance of a luminance source
This will bring large measurement errors to operations such as probe calibration

Method used

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Embodiment Construction

[0023] A brightness generator such as figure 1 As shown, it includes an integrating sphere 1. The integrating sphere 1 is a medium-sized integrating sphere. There is a circular light outlet 2 on the front of the integrating sphere 1. The diameter of the light outlet is about 1 / 10 of the diameter of the integrating sphere. Four detector interfaces 5 and eight light source interfaces 7 are installed on the hemisphere with the center of the mouth 2 as the apex, which are symmetrically and evenly distributed on the spherical surface with the light outlet 2 as the center. The edges and apertures are the same, the angle between the center of the detector interface 5 and the center of the light outlet 2 and the center of the integrating sphere 1 is 18°, the center of the light source interface 7 and the center of the light outlet 2 and the center of the integrating sphere 1 The angle between the connecting lines is 45°. Near the light source 8 inside the integrating sphere 1, a ligh...

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Abstract

The invention discloses a brightness generator. The brightness generator comprises an integrating sphere provided with a round light outlet; the whole or part of the integrating sphere is arranged in a housing, the edge of the light outlet is provided with photoelectric probes which are symmetrically distributed around the light outlet, and the spherical surface of the integrating sphere is also provided with light sources which are symmetrically distributed around the light outlet. By regulating the input power of each light source or turning on / off each light source, the uniformity and the adjustability of the radiance of the light outlet is ensured, a large-area standard brightness source is realized, and the brightness generator is easy to achieve the high stability of color temperature and brightness output with high homogeneous degree.

Description

【Technical field】 [0001] The invention belongs to the field of optical radiation measurement, in particular to a brightness generator. 【Background technique】 [0002] In the field of high-precision optical radiation measurement, a light source with good uniformity of illuminance / luminance is often required to realize the calibration and measurement of the photoelectric probe. The standard luminance source is generally realized by using a light source plus an integrating sphere: the light emitted by the light source is mixed by the integrating sphere , emerge from the light exit window of the integrating sphere to provide surface light source output. However, due to the instability of the light source, the mechanical defects of the integrating sphere itself, and the uneven coating, the irradiance / radiance at the exit window of the existing integrating sphere brightness source cannot be completely uniform, especially when the integrating sphere When the diameter of the light ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S2/00F21V7/04F21V23/00G01M11/02F21V29/506F21V29/83
Inventor 潘建根陈双
Owner HANGZHOU EVERFINE PHOTO E INFO
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