摘要:
An apparatus emits a laser light beam with a first aspect ratio of etendue R1, wherein the optical invariant with respect to a first direction is less than half the optical invariant with respect to a second orthogonal direction. A first cylindrical lens collimates the beam in the first direction. A second cylindrical lens collimates the light beam in the second direction. A bisecting reflective surface has an edge that splits the collimated beam into undeviated and first deviated beam paths. A folding reflective surface redirects the first deviated beam path back toward the bisecting reflective surface, optically parallel with and displaced from the undeviated beam path with respect to the first direction. At least a portion of the redirected first deviated beam path passes the edge and combines with the undeviated path to form an output beam having a second aspect ratio of etendue R2 not equal to R1.
摘要:
An apparatus for forming a color image has at least a first, a second, and a third illumination source, each illumination source energizable to provide continuous illumination of a first, a second, or a third wavelength band, respectively, to an optical multiplexer. The optical multiplexer is actuable to cyclically switch received light from each one of the illumination sources, in turn, to each one of at least a first, a second, and a third projector channel in a repeated sequence. The first projector channel connects to a first projector apparatus, the second projector channel connects to a second projector apparatus, and the third projector channel connects to a third projector apparatus. Each projector apparatus has a light modulator that is energizable to form an image from the light of the first, second, or third wavelength band that is cyclically switched onto its projector channel from the optical multiplexer.
摘要:
An apparatus for forming a color image has at least a first, a second, and a third illumination source, each illumination source energizable to provide continuous illumination of a first, a second, or a third wavelength band, respectively, to an optical multiplexer. The optical multiplexer is actuable to cyclically switch received light from each one of the illumination sources, in turn, to each one of at least a first, a second, and a third projector channel in a repeated sequence. The first projector channel connects to a first projector apparatus, the second projector channel connects to a second projector apparatus, and the third projector channel connects to a third projector apparatus. Each projector apparatus has a light modulator that is energizable to form an image from the light of the first, second, or third wavelength band that is cyclically switched onto its projector channel from the optical multiplexer.
摘要:
An apparatus for obtaining energy from a polychromatic radiant energy source has a light concentrator for concentrating and redirecting incident radiant energy, having an optical axis, and a spectral separator disposed along the optical axis, apart from the light concentrator and in the path of concentrated, redirected radiant energy. The spectral separator has a first planar surface treated to reflect a first spectral band of light toward a first focal region and to transmit a second spectral band and a second planar surface spaced apart from the first planar surface and oblique with respect to the first planar surface. The second planar surface is treated to reflect the second spectral band back through the first planar surface and toward a second focal region spaced apart from the first focal region. First and second light receivers are disposed nearest each respective focal region for receiving the first and second spectral bands.
摘要:
A light pulse conditioning apparatus has at least first and second curved reflective surfaces that share a common focus and a light-redirecting element disposed between the first and second curved reflective surfaces to redirect at least a portion of an incident light beam toward the second curved reflective surface as a delayed beam portion. A beam-shifting compensating element is disposed between the first curved reflective surface and the light-redirecting element and in the path of the delayed beam portion, for shifting the optical path of the delayed beam portion as it returns toward the light-redirecting element.
摘要:
An apparatus emits a laser light beam with a first aspect ratio of etendue R1, wherein the optical invariant with respect to a first direction is less than half the optical invariant with respect to a second orthogonal direction. A first cylindrical lens collimates the beam in the first direction. A second cylindrical lens collimates the light beam in the second direction. A bisecting reflective surface has an edge that splits the collimated beam into undeviated and first deviated beam paths. A folding reflective surface redirects the first deviated beam path back toward the bisecting reflective surface, optically parallel with and displaced from the undeviated beam path with respect to the first direction. At least a portion of the redirected first deviated beam path passes the edge and combines with the undeviated path to form an output beam having a second aspect ratio of etendue R2 not equal to R1.
摘要:
A Fizeau interferometer incorporates an off-axis paraboloidal reflector that forms virtual images of reference and test surfaces and a camera lens that converts the virtual images into real images on a camera detector surface. The camera detector surface is arranged together with the camera lens to accommodate tilting of the virtual images by the off-axis paraboloidal reflector.
摘要:
A Fizeau interferometer incorporates an off-axis paraboloidal reflector that forms virtual images of reference and test surfaces and a camera lens that converts the virtual images into real images on a camera detector surface. The camera detector surface is arranged together with the camera lens to accommodate tilting of the virtual images by the off-axis paraboloidal reflector.
摘要:
An optical system for producing a pattern of focused spots, such as a maskless lithographic projection system, includes an illuminator, a pattern generator, and an imager. The illuminator includes a light source for generating a light beam, a homogenizer for evenly dispersing light within the light beam, and a condenser for coupling the light source to the homogenizer. The pattern generator has individually addressable elements illuminated by the light beam from the illuminator. The imager images the addressable elements of the pattern generator onto corresponding focusing elements for forming focused spots that are conjugate to aperture stops in both the imager and the illuminator. The illuminator underfills the imager aperture stop for reducing the size of the focused spots. The condenser underfills the illuminator aperture stop for further controlling the size and shape of the focused spots.
摘要:
A light pulse conditioning apparatus has at least first and second curved reflective surfaces that share a common focus and a light-redirecting element disposed between the first and second curved reflective surfaces to redirect at least a portion of an incident light beam toward the second curved reflective surface as a delayed beam portion. A beam-shifting compensating element is disposed between the first curved reflective surface and the light-redirecting element and in the path of the delayed beam portion, for shifting the optical path of the delayed beam portion as it returns toward the light-redirecting element.