Retro-reflector assembly and opacity monitor incorporating same

Details Retro-reflector assembly and opacity monitor incorporating same Retro-reflector assembly and opacity monitor incorporating same

2006-05-08

2008-09-30

Cherry, Euncha P (Department: 2872)

Optical: systems and elements

Signal reflector

3-corner retroreflective

C359S834000

Reexamination Certificate

active

07429112

ABSTRACT:
A retro-reflector assembly (1) for incorporating in an opacity monitor, includes several small corner-cube prisms (2) of cylindrical section. The invention also includes an opacity monitor incorporating a retro-reflector assembly as defined above.

REFERENCES:
patent: 4470664 (1984-09-01), Shirasawa
patent: 5231539 (1993-07-01), McMillen
patent: 5893214 (1999-04-01), Meier et al.
patent: 6781695 (2004-08-01), Hovan et al.
patent: 2003/0038940 (2003-02-01), Metcalfe et al.
patent: 2004/0169928 (2004-09-01), Nilsen et al.
patent: 60-225102 (1985-11-01), None
Extended European Search Report dated Oct. 2, 2006 which issued in connection with corresponding European Application No. 06076032.9.

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