Abstract:
A light pulse conditioning.apparatus (30) has first and second curved reflective surfaces (12a, 12b) that share a common focus and a light-redirecting element (16) disposed between the first and second curved reflective surfaces to redirect a portion of an incident light beam (14) toward the second curved reflective surface (12b) as a delayed beam portion. A beam-shifting compensating element (24) is disposed between the first curved reflective surface (12a) and the light-redirecting element (16), for shifting the optical path of the delayed beam portion as it returns toward the light-redirecting element (16). Furthermore, the light conditioning apparatus (30) may have a measurement device (52) using a sensor (54) to detect the energy level of the light beam (14) from the pulset radiation source (38) and providing a signal to a controller (56) for a modulator element (34) of a modulator assembly (32). When the pulse power exceeds a value, the control loop (50) energizes the modulator element (34) to provide some level of attenuation.
Abstract:
A micro-electro-mechanical (MEMS) based surveillance system and a method for using the MEMS based surveillance system are described herein for imaging an object. In one example, the MEMS based surveillance system can record images of an object from four different wavelength regions including visible light, near- infrared light, infrared light, and far infrared light.
Abstract:
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.
Abstract:
An apparatus for providing a modulated pulsed radiation beam (20) has a radiation source (16) for providing a pulsed radiation beam (10) at a constant pulse repetition frequency and a number of beam intensity modulators (18a-18e). A beam-deflecting element (12) in the path of the pulsed radiation beam and rotatable about an axis redirects the pulsed radiation beam cyclically towards each of the plurality of beam intensity modulators in turn. A beam-recombining element rotatable about the axis in synchronization with the beam-deflecting element combines modulated light, from each of the beam intensity modulators in order to form the modulated pulsed radiation beam at the constant pulse repetition frequency. At least one beam-pointing correction apparatus optically conjugates the beam-deflecting element and the beam recombining element at at least one rotational position about the axis.
Abstract:
Disclosed are photo or electron beam curable polymerizable compositions, and preparation thereof and devices (101)containing such cured material. The composition contains completely or substantially completely hydrogenated hydrocarbon-based material completely free or substantially free of carbon-carbon double and triple bonds containing photo or electron beam curable terminal or pendant groups, low-outgassing photoinitiators, an optional viscosity adjustment component and an optional filler. The composition is visible light, UV or electron beam curable. It cures into a low-modulus, low outgassing polymer material. The composition can be used as an adhesive, sealant or lens potting material (103,107). It is ideal for use in lithographic tools and other optical devices involving deep or vacuum ultraviolet radiations, in particular, as lens potting materials (107,103) for 248 nm, 193 nm and 157 nm lithographic tools, as well as other optical devices involving using high fluence irradiation.
Abstract:
An apparatus for providing a pulsed radiation beam has a radiation source providing a pulsed radiation beam at a constant pulse repetition frequency. A beam deflector in the path of the pulsed radiation beam is actuable to redirect the pulsed radiation beam cyclically towards each of a plurality of beam intensity modulators in turn. A beam recombiner combines modulated light from each of the plurality of beam intensity modulators in order to form the modulated pulsed radiation beam at the constant pulse repetition frequency.
Abstract:
An apparatus for providing a pulsed radiation beam has a radiation source providing a pulsed radiation beam at a constant pulse repetition frequency. A beam deflector in the path of the pulsed radiation beam is actuable to redirect the pulsed radiation beam cyclically towards each of a plurality of beam intensity modulators in turn. A beam recombiner combines modulated light from each of the plurality of beam intensity modulators in order to form the modulated pulsed radiation beam at the constant pulse repetition frequency.
Abstract:
Disclosed are photo or electron beam curable polymerizable compositions, and preparation thereof and devices containing such cured material. The composition contains completely or substantially completely hydrogenated hydrocarbon-based material completely free or substantially free of carbon-carbon double and triple bonds containing photo or electron beam curable terminal or pendant groups, low-outgassing photoinitiators, an optional viscosity adjustment component and an optional filler. The composition is visible light, UV or electron beam curable. It cures into a low-modulus, low outgassing polymer material. The composition can be used as an adhesive, sealant or lens potting material. It is ideal for use in lithographic tools and other optical devices involving deep or vacuum ultraviolet radiations, in particular, as lens potting materials for 248 nm, 193 nm and 157 nm lithographic tools, as well as other optical devices involving using high fluence irradiation.