Photometer having asymmetrical aperture and with compensation fo

Photometer mode indicator

Photometer with modular light emitter

Photometering apparatus having a split light receiving device

Photometric apparatus

Photometric apparatus

Photometric apparatus

Photometric circuit

Photometric device and method

Photometry device with correction for temperature change

Photosensor apparatus and image forming apparatus

Portable test apparatus for low light level devices

Portable traffic signal light photometer

Position measuring system

Printing medium detecting device, image forming apparatus...

Probe for a radiometer

Procedure and device for measurement of exposure times in optica

Process and apparatus for spectral reflectance and transmission

Process and circuit arrangement for amplifying an input current

Radiation energy receiver