Photometric device and method

Photometry device with correction for temperature change

Photosensor apparatus and image forming apparatus

Portable laser power measuring apparatus

Portable laser power measuring apparatus

Portable test apparatus for low light level devices

Portable traffic signal light photometer

Position measuring system

Power meter for high energy lasers

Printing medium detecting device, image forming apparatus...

Probe for a radiometer

Prober for testing light-emitting devices on a wafer

Procedure and device for measurement of exposure times in optica

Process and apparatus for measuring small quantities of light

Process and apparatus for spectral reflectance and transmission

Process and circuit arrangement for amplifying an input current

Process and device for monitoring the illumination of lamp...

Pulsed laser beam intensity monitor

Radiation energy receiver

Radiation measuring system