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Spectroradiometers  
 
 

 

 

 

 

 

The optical quantity measured by a spectroradiometer system is determined by the input optic employed, as

described in the table below. An appropriate calibration source is required in each case. Bentham manufactures

spectroradiometers covering the spectral range 150nm to 30000nm. All photometric, colorimetric, UV radiometric

etc. quantities are most accurately determined by performing spectroradiometric measurements and using

software to integrate/weight values as defined by CIE etc. However, Bentham also supplies a range of filter based

radiometers/photometers with close match spectral responses for simple integral type measurements.

 

Typically a light source and UMS, universal measurement station, is added to spectroradiometer type systems in

order to perform spectrophotometric measurements such as transmission and reflectance.

 

 

Typical Input

Optic

Measurement

Quantity

Unit

Photometric Parameter

Photometric Unit

Diffuser

Spectral irradiance

mW/(m2.nm)

Illuminance

lux

Telescope

Spectral radiance

mW/(sr.m2.nm)

Luminance

cd/m2

Baffled Tube

Spectral radiant intensity

mW/(sr.nm)

Luminous intensity

cd

Integrating Sphere

Spectral total radiant flux

mW/nm

Total luminous flux

lumens

 

 

 

 
       
 

 

Asia Qtech Instrument Inc
4F-B, No 327, Sec. 1, Tiding Blvd., Neihu District, Taipei, Taiwan
Tel:+886-2-27966289 Fax:+886-2-27956098