Wavelength selectivity enabling subject monitoring outside...

Details Wavelength selectivity enabling subject monitoring outside... Wavelength selectivity enabling subject monitoring outside...

2006-08-15

2006-08-15

Wu, Daniel (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C359S229000, C359S548000, C340S439000

Reexamination Certificate

active

07091867

ABSTRACT:
A detection system for monitoring a subject remains outside the normal field of view of the subject by using a wavelength selective optical member. In one application, an eye of a driver is repeatedly or continuously illuminated and imaged without effect on the field of view of the driver. A dichroic mirror may be used to provide the wavelength selectivity. For the application in which the system is used for a motor vehicle, such as an automobile, the dichroic mirror may be achieved by coating a portion or all of the windshield so as to pass visible light, while reflecting detection light. Other applications of the detection system include monitoring a subject engaged in a person-to-person interaction, wherein a dichroic mirror is defined by a divider between the two persons.

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patent: 2004/0070509 (2004-04-01), Grace et al.
patent: 2005/0007552 (2005-01-01), Fergason et al.

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