Abstract:
펄스 증배기(pulse multiplier)는 편광 빔 스플리터(polarizing beam splitter), 파장판(wave plate), 및 한 세트의 거울들을 포함한다. 상기 편광 빔 스플리터는 입력 레이저 펄스를 받아 들인다. 상기 파장판은 상기 편광 빔 스플리터로부터 빛을 받아 들여 제 1 세트의 파장들 및 제 2 세트의 파장들을 발생시킨다. 상기 제 1 세트의 파장들은 상기 제 2 세트의 파장들과 서로 다른 편광을 가진다. 상기 편광 빔 스플리터, 상기 파장판, 및 상기 한 세트의 거울들은 고리형 공진기(ring cavity)를 생성시킨다. 상기 편광 빔 스플리터는 상기 제 1 세트의 펄스들을 상기 펄스 증배기의 출력으로서 투과시키고, 상기 제 2 세트의 펄스들을 상기 고리형 공진기로 반사시킨다. 이 펄스 증배기는 저렴한 비용으로, 최소한의 총 파워 손실로 초당 펄스들의 수를 증가시키면서 펄스당 피크 파워를 감소시킬 수 있다.
Abstract:
본 발명은 부르스터 각으로 가공된 광학부품을 공진기 안에서 광축조준을 하는 방법에 관한 것이다. 레이저광을 단경정에 입사시킬 때 결정을 투과한 레이저 광은 코노스코프의 타원 동심원 무늬가 형성된다. 코노스코프의 타원 동심원 무늬(도 2) 위치와 조준 광축의 위치가 브르스터 각에 따라 다르게 형성된다. 코노스코프의 타원 동심원 무늬의 중심 좌표와 조준 광축의 좌표를 맞추어서 광축을 조준을 하는 방법이다. 광축조준, 코노스코프 , 부르스터각, 레이저공진기
Abstract:
In a system for analyzing optical properties of an object (350) a point source of light (100) composed of multiple spectral bands each having a respective amplitude, phase and polarization is converted by first optics (120, 150) into a line light source to illuminate an object line on the object. A beam splitter (200) splits the light exiting the first optics and directs a first portion of light on to the object (350) as an illuminated line and a second portion of the light on to a reference mirror (450). Second optics (500) collects respective first and second lines of light reflected by the object and mirror of and collinearly images the reflected lines of light as an image line on to an imaging spectrometer (550) wherein mutual interference allows determination of the optical properties of the object at each point along the object line.
Abstract:
A method is disclosed evaluating a silicon layer (22) crystallized by irradiation with pulses from an excimer-laser. The crystallization produces periodic features on the crystallized layer dependent on the number of and energy density ED in the pulses to which the layer has been exposed. An area of the layer is illuminated with light (29). A microscope image of the illuminated area is made from light diffracted from the illuminated area by the periodic features. The microscope image includes corresponding periodic features. The ED is determined from a measure of the contrast of the periodic features in the microscope image.
Abstract:
Techniques include receiving a design of an integrated computational element (ICE) including specification of a substrate and a plurality of layers, their respective target thicknesses and complex refractive indices, complex refractive indices of adjacent layers being different from each other, and a notional ICE fabricated in accordance with the ICE design being related to a characteristic of a sample; forming at least some of the layers of a plurality of ICEs in accordance with the ICE design using a deposition source, where the layers of the ICEs being formed are supported on a support that is periodically moved relative to the deposition source during the forming; monitoring characteristics of the layers of the ICEs during the forming, the monitoring of the characteristics being performed using a timing of the periodic motion of the support relative to the deposition source; and adjusting the forming based on results of the monitoring.
Abstract:
This disclosure is generally directed to systems for imaging polarization properties of optical-material samples. As one aspect, there is provided a system for precise, simultaneous imaging of both the in-plane and out-of-plane birefringence properties of sample material over a wide range of incidence angles. The spatially resolved imaging approach described here is amenable to determination of a wide range of polarimetric properties, in addition to the inplane and out-of-plane birefringence measure discussed as a preferred embodiment.
Abstract:
Polarization selective surface enhanced Raman spectroscopy (SERS) includes a plurality of nanofingers arranged as a SERS multimer to exhibit a polarization-dependent plasmonic mode and one or both of a stimulus source and a Raman detector. The stimulus source is to illuminate the SERS multimer with a stimulus signal and the Raman detector is to detect a Raman scattering signal emitted by an analyte in a vicinity of the SERS multimer. One or both of the Raman scattering signal has a polarization state dictated by or associated with the polarization-dependent plasmonic mode and the stimulus signal has a polarization state corresponding to the polarization-dependent plasmonic mode.