Illuminance measurement of vehicle lamp

Illuminance meter, illuminance measuring method and exposure...

Illuminance sensing head structure

Illuminant discrimination apparatus and method

Illuminant discriminator providing detection of high efficiency

Illuminant discriminator with improved boundary conditions

Illumination flicker meter

Illumination measurement device

Image forming apparatus

Image intensity degradation tester

Indication and photometric unit

Instrument for measurement of exposure from a laser radiation

Integrated sphere for diffusal reflectance and transmittance

Integrating light mixer

Integrating photometer for measuring total flux of light...

Integrating sphere power meter

Inverse fourth power photometric calibrator