Laser indication light configuration

Details Laser indication light configuration Laser indication light configuration

2002-03-19

2010-12-28

Harvey, Minsun (Department: 2828)

Optics: measuring and testing

By dispersed light spectroscopy

With raman type light scattering

C356S300000, C351S041000

Reexamination Certificate

active

07859660

ABSTRACT:
Indicator light apparatus and methods associated with a laser beam having a primary wavelength enable an operator to see the indicator while wearing protective eyewear tuned to the primary wavelength. The apparatus includes a source of indicator light other than the primary wavelength, a first optical element for co-injecting the indicator light into the laser beam to form a co-propagating beam, and an optical or physical configuration enabling an operator to view light from the co-propagating beam. The first optical element may be some form of beam splitter or combiner, and the configuration enabling an operator to view light from the co-propagating beam uses a diffuser upon which the co-propagating beam impinges. The indicator light is preferably derived from an inexpensive source, such as a diode laser operating in the 670-690 nm range. The invention is useful in many different environments, including stimulate emission systems, wherein one or more optical elements are used to direct the laser beam onto a sample to stimulate an optical emission therefrom. The stimulated emission may be representative of a Raman or fluorescence spectrum, for example.

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California Institute of Technology, Laser Safety Manual, Jan. 1998, pp. 1-5.

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