Isochromatic and isothermic continuous dimming device based on integrating sphere

Abstract

The invention relates to an isochromatic and isothermic continuous dimming device based on an integrating sphere, comprising the integrating sphere, a light source and a guide way. The integrating sphere is internally provided with a baffle screen; an optical window and a light through hole are arranged on the sphere wall of the integrating sphere; the optical window and the light through hole are respectively arranged at the two sides of the baffle screen; the light source is a movable light source which is arranged on the guide way; and the movable light source is as high as the centre of the light through hole on the wall of the integrating sphere. Under a condition that the light intensity of the movable light source stays the same, according to the low of inverse distance to a power, the invention leads the movable light source to move on the guide way, changes a distance from the light source to the integrating sphere, leads illuminance which is received at the inner wall of the integrating sphere to correspondingly change, and changes a luminance brightness value which is output from the optical window of the integrating sphere, so as to realize isochromatic and isothermic continuous dimming.

Description

technical field [0001] The invention relates to a dimming device, in particular to a constant color temperature continuous dimming device based on an integrating sphere. Background technique [0002] The integrating sphere is a hollow sphere whose inner wall is coated with diffuse reflection material. It has excellent radiance output surface uniformity as a light source. It is an ideal diffuse expansion source similar to a Lambertian body. It is widely used in optical sensors. Optical parameter testing and radiation calibration and other fields. [0003] Chinese Patent Gazette discloses a "solar simulator based on integrating sphere" (disclosure date: September 26, 2007; publication number CN101042209A), which includes a light source and an integrating sphere; or xenon lamp) placed at the center of the integrating sphere or on the wall of the integrating sphere, there is a light window on the wall of the integrating sphere; Exit directly from the light window. This device...

AI Technical Summary

Problems solved by technology

Changing the light source current will inevitably change the output spectral distribution of the integrating sphere, that is, the color temperature will change, and it will also have a certain impact on the stability of the light source; although changing the number of light sources does not change the color temperature, it cannot be continuously adjusted. , so it is not possible to accurately simulate a specific radiance scene target, and the increase in the number of light sources also increases the complexity of the light source structure, which brings certain difficulties to the system design

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