Illumination – Plural light sources – With modifier
Reexamination Certificate
2008-04-15
2008-04-15
O'Shea, Sandra (Department: 2875)
Illumination
Plural light sources
With modifier
C362S237000, C362S240000, C362S289000, C362S033000, C359S387000
Reexamination Certificate
active
10082842
ABSTRACT:
The objective lens assembly of an optical inspection device is surrounded coaxially of its optical axis by an illuminator housing having therein a central opening surrounded by a circular array of reflective mirror surfaces or facets that are inclined at like angles to the optical axis, and which register with the light emitting of a like circular array of LEDs mounted in the housing in radially spaced, coaxial relation to the mirror facets. Mounted coaxially beneath the illuminator housing for vertical adjustment relative thereto is a generally disc-shaped Fresnel lens. The lens is movable by drive means optionally between an uppermost position adjacent the underside of the housing and a lowermost position adjacent the work that is to be inspected. When the lens in its uppermost position light beams from the LEDs are reflected by the mirror facets downwardly through an opening in the bottom of the illuminator housing in the form of an expanding cone of illumination and annularly onto the upper surface of the Fresnel lens. The Fresnel lens then refracts the cone of light and directs it toward the work that is to be inspected at an angle of incidence of 15° with respect to the optical axis. When the lens is shifted downwardly toward the workpiece, the angle of incidence of the refracted illumination increases to a maximum of 75°.
REFERENCES:
patent: 5951139 (1999-09-01), Smith et al.
patent: 6238060 (2001-05-01), Bourn et al.
Choate Albert
Gilman William R.
Alavi Ali
O'Shea Sandra
Shlesinger Fitzsimmons & Shlesinger
LandOfFree
Variable incidence oblique illuminator device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable incidence oblique illuminator device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable incidence oblique illuminator device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3940289