Polarized light type visibility measurement instrument

Abstract

The invention discloses a polarized light type visibility measurement instrument, in particular a visual optical measurement instrument. Under the condition of keeping background luminance of a view field invariable, the luminance of a target to be measured is changed by the change of the corner of an analyzer in the instrument relative to a polarizer according to a polarization principle of light so that the contrast ratio of the target to the background of the target is changed and the visual critical condition is met, and the corner is converted to the function of visibility; therefore, the aim of measuring the visibility of the target is fulfilled. The visibility measurement instrument is the visual optical measurement instrument in the field of psychophysics. In the illumination engineering and technology, the number and quality of illumination can be evaluated quantitatively, the visual fatigue can be measured quantitatively, and the visibility (seeing or visuality) of special targets (such as maritime navigation, aviation flight and other aspects) can be measured under various natural conditions (climate, rain and fog).

Description

Technical field: [0001] The polarized light type dioptric measuring instrument of the invention belongs to visual optical instruments. In lighting engineering and technology, the quantity and quality of lighting can be quantitatively evaluated, and visual fatigue can be quantitatively measured. It can also be used to quantitatively measure the visibility of special targets under various climatic conditions (visibility or Visibility). Background technique: [0002] In the past, in terms of navigation, in order to measure the observation target (enemy ship or obstacle) under different natural (dark or foggy) conditions, optical wedges were used to make optical instruments. But with the development of science, it has long been eliminated. In modern lighting engineering and technology, the subjective evaluation of many people is used to evaluate the quantity of lighting, that is, whether the illuminance (light) is enough, and whether the lighting quality is good enough (whethe...

AI Technical Summary

Problems solved by technology

In modern lighting engineering and technology, the subjective evaluation of many people is used to evaluate the quantity of lighting, that is, whether the illuminance (light) is enough, and whether the lighting quality is good enough (whether it is glare, etc.)

This kind of subjective evaluation is not quantitative, it is inaccurate, it is the result of statistics based on the feelings of most people

With the rapid development of lighting science, this evaluation method is not suitable for the needs of engineering technology

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