All-reflective optical target illumination system with high numerical aperture

Patent · Sat Dec 31 23:00:00 EST 1977

OSTI ID:863055

Sigler, Robert D ^[1]

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1. Ann Arbor, MI

An all-reflective optical system for providing illumination of a target focal region at high numerical aperture from a pair of co-axially, confluent collimated light beams. A target cavity is defined by a pair of opposed inner ellipsoidal reflectors having respective first focal points within a target region and second focal points at a vertex opening in the opposing reflector. Outwardly of each inner reflector is the opposed combination of a spherical reflector, and an outer generally ellipsoidal reflector having an aberrated first focal point coincident with the focus of the opposing spherical reflector and a second focal point coincident with the second focal point of the opposing inner ellipsoidal reflector through a vertex opening in the spherical reflector. The confluent collimated beams are incident through vertex openings in the outer ellipsoidal reflectors onto respective opposing spherical reflectors. Each beam is reflected by the associated spherical reflector onto the opposing outer ellipsoidal reflector and focused thereby onto the opposing inner ellipsoidal reflector, and then onto the target region.

• Assignee: KMS Fusion, Inc. (Ann Arbor, MI)
• Patent Number(s): US 4084887
• OSTI ID: 863055
• Country of Publication: United States
• Language: English

Related Subjects

/359/376/
aberrated
all-reflective
all-reflective optical
aperture
associated
beam
beams
cavity
co-axially
coincident
collimated
collimated beam
collimated beams
collimated light
combination
confluent
confluent collimated
defined
ellipsoidal
ellipsoidal reflector
ellipsoidal reflectors
focal
focal region
focus
focused
illumination
incident
inner
light
light beam
light beams
numerical
numerical aperture
openings
opposed
opposing
optical
optical target
outer
outwardly
pair
providing
providing illumination
reflected
reflective optical
reflector
reflectors
region
respective
spherical
target
target focal
target illumination
target region
vertex