Microphotometer

Japanese: ミクロフォトメーター(英語表記)microphotometer
Microphotometer
A device that measures the light transmittance (or reflectance) of a very small object or a very small part of an object. This includes devices that measure the darkness of each part of the spectrum on a dry plate using a spectrograph of a light source taken with a spectrograph, as well as microspectroscopic devices that perform optical qualitative or quantitative analysis of small crystals, intracellular substances, and other things. The light from a light source is made monochromatic using an appropriate color filter or monochromator, and then focused into a narrow beam of light through a pinhole. Using the microscope's optical system in reverse, the light passes through the eyepiece and forms a reduced image of the pinhole at the end of the objective lens.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
微小物体,または物体の微小部分の光に対する透過率(または反射率)を測定する装置。分光写真器で撮影した発光体のスペクトル写真について,乾板上のスペクトル各部分の黒化度を測定する装置のほか,微小結晶,細胞内物質その他を光学的に定性,または定量分析する顕微分光装置も含まれる。光源の光を適当な色フィルター,またはモノクロメーターにより単色化し,ピンホールで細い光線束に絞り,顕微鏡の光学系を逆に用いて接眼レンズのほうから通して対物レンズの先にピンホールの縮小した像を結ばせる。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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