Photometering apparatus for a camera

Photometering apparatus having a split light receiving device

Photometric analysis of water suspensions

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 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