请输入您要查询的英文单词:

 

单词 adaptometer
释义

adaptometer


Translations

Adaptometer


adaptometer

[‚a‚dap′tä·məd·ər] (engineering) An instrument that measures the lowest brightness of an extended area that can barely be detected by the eye.

Adaptometer

 

an apparatus for measuring the optical sensitivity of the eye by finding the minimum light intensity which creates a sensation of light; it is also used to study a number of physiological characteristics of sight, such as the course of adaptation to shadow and vision in twilight.

The design of the adaptometer ensures a smooth variation in the precisely measured intensities of light over a wide range (from 10 million to several hundred million times). When the adaptation to dark is studied over a long time (up to 60 minutes) the investigator seeks the dependence (generally expressed graphically) of the sensitivity of the eye to the interval of time spent in the dark.

In order to obtain a base value for adaptation (during three minutes), the investigator studies the variations of the brightness of colors in dusk visibility.

V. A. KOSTELOVSKII

adaptometer


adaptometer

 [ad″ap-tom´ĕ-ter] an instrument for measuring the time required for retinal adaptation, i.e., for regeneration of the visual purple; used in detecting night blindness, vitamin A deficiency, and retinitis pigmentosa.

ad·ap·tom·e·ter

(ad'ap-tom'ĕ-tĕr), A device for determining the course of retinal dark adaptation and for measuring the minimum light threshold.

ad·ap·tom·e·ter

(ad'ap-tom'ĕ-tĕr) A device for determining the course of retinal dark adaptation and for measuring the minimum light threshold.

adaptometer 

An instrument for measuring the variations in threshold of luminance. The most common is that of Goldmann-Weekers.
随便看

 

英语词典包含2567994条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2024/11/14 16:27:38