Spectroscopy apparatus and method

Details Spectroscopy apparatus and method Spectroscopy apparatus and method

2006-11-21

2006-11-21

Lee, Hwa (Andrew) (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

Reexamination Certificate

active

07139071

ABSTRACT:
A spectroscopy method in which a sample is scanned without moving the sample. Light from the sample16is collected by a lens14and analyzed at a spectrum analyzer28before being focused onto a photodetector32. Light from the focal point of the lens14is brought to a tight focus on the photodetector32whilst light from in front of or behind the focal point comes to a more diffuse focus. Light from the pixels on the photodetector32corresponding to the focal point of the lens14is processed, whilst light from pixels outside this region is ignored, thus forming a ‘virtual slit’. The sample16is scanned in a vertical direction by moving the ‘virtual slit’ up and down, by changing the designated rows of pixels from which data is analyzed. The sample is scanned in a horizontal direction by moving a vertical slit24in the light path in a horizontal direction.

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