Photodetector and spectrometer using the same

Photodiode array

Photodiode array spectrometer

Photodiode array spectrometer

Photodiode configurations for simultaneous background correction

Photoelectric measuring apparatus for use in automatic analyzer

Photoelectric measuring system with integrated optical circuit i

Photoelectric position encoder using diffraction imagery

Photoelectric position indicator with a light-directing phase gr

Photoelectric position measuring system

Photoelectric position measuring system with integral optical ci

Photoelectric position-measuring arrangement having a plurality

Photometer

Photometer for measuring atomic fluorescence

Photometer including auxiliary indicator means

Photometric absorption detector

Photometric analysis of natural waters

Photometric apparatus and process

Photometric apparatus with multi-wavelength excitation

Photometric device