Optical system for mapping signal light onto a detector

Details Optical system for mapping signal light onto a detector Optical system for mapping signal light onto a detector

2011-05-24

2011-05-24

Epps, Georgia Y (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S208100, C359S558000, C359S566000, C359S571000

Reexamination Certificate

active

07947946

ABSTRACT:
The invention relates to an optical system that particularly allows an improved detection of signal light propagating from a light source (1) through a flat glass substrate (11). SC-modes of this signal light that would normally be totally internally reflected at the backside (10) of the substrate (11) are coupled out by a first diffractive optical element DOE (21). To map all signal light leaving the substrate (11) onto a single target location (51), a focusing lens (31) and a second DOE (41) are disposed in the optical path behind the substrate (11). The DOEs (21, 41) may for example be a ID sinusoidal grating or a 2D blaze grating. The optical system may particularly be applied in an investigation apparatus for detecting multiple spots of a fluorescent sample material.

REFERENCES:
patent: 3728014 (1973-04-01), Rosenblum
patent: 4708436 (1987-11-01), Kleinknecht
patent: 6312961 (2001-11-01), Voirin et al.
patent: 2002/0005938 (2002-01-01), Omura
patent: 2002/0054558 (2002-05-01), Freeman
patent: 2002/0159377 (2002-10-01), Saito et al.
patent: 2004/0130804 (2004-07-01), Mimori
patent: 2006/0056027 (2006-03-01), Feldman
patent: 1720340 (2006-11-01), None
patent: 02059583 (2002-08-01), None

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