All-reflective optical target illumination system with high numerical aperture

Patent · Sun Dec 31 23:00:00 EST 1978

OSTI ID:863383

Thomas, Carlton E ^[1]; Sigler, Robert D ^[1]; Hoeger, John G ^[2]

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1. Ann Arbor, MI
2. Newport, CA

An all-reflective optical system for providing illumination of a target focal region at high numerical aperture from a pair of confluent collimated light beams. The collimated beams are each incident upon an associated concave eccentric pupil paraboloidal reflective surface, and thereby each focused through an opening in an associated outer ellipsoidal reflective surface onto a plane reflector. Each beam is reflected by its associated plane reflector onto the opposing concave surface of the outer ellipsoids to be focused through an opening in the plane surface onto an opposing inner concave ellipsoidal reflective surface, and thence onto the target region.

• Assignee: United States of America as represented by Department of Energy (Washington, DC)
• Patent Number(s): US 4161351
• OSTI ID: 863383
• Country of Publication: United States
• Language: English

Related Subjects

/359/376/
all-reflective
all-reflective optical
aperture
associated
beam
beams
collimated
collimated beam
collimated beams
collimated light
concave
concave surface
confluent
confluent collimated
eccentric
ellipsoidal
ellipsoids
focal
focal region
focused
illumination
incident
inner
light
light beam
light beams
numerical
numerical aperture
opposing
optical
optical target
outer
pair
paraboloidal
plane
providing
providing illumination
pupil
reflected
reflective
reflective optical
reflective surface
reflector
region
surface
target
target focal
target illumination
target region
thence