Abstract:
An optical system and method comprising a diffraction grating which consists of diffracting elements spaced from one another by unequal distances. Correction of residual defocusing in the image produced by such a grating is accomplished by translating it along its surface. As one embodiment, a monochromator is constructed in which a self-focusing grating scans the value in wavelength which is transmitted between fixed slits by rotation of the grating about an axis fixed in space. Combined with a translation of the grating along its surface, such a monochromator produces a symmetrical image exactly in focus at the exit slit for all scanned wavelengths.
Abstract:
An optical device for the spectral analysis of a light source comprises
a) a spectrograph assembly (1,2,31,32) including a dispersive element (32), and b) a classical collimator (3), the device being characterised in that the spectrograph assembly (1,2,31,32) supplies a complete intermediate spectrum at the object focus of the classical collimator and the classical collimator (3) reforms, at its image focus, an image of the dispersive element (32). The spectrograph assembly (1,2,31,32) is preferably a Czerny-Turner or other type of spectrograph comprising an entry slit (31), two juxtaposed concave mirrors (1,2) of the same focal length and a dispersive element (32) placed strictly in the common focal plane of the two mirrors (1,2). Most preferably, the classical collimator (3) is the first mirror of a second, similar spectrograph assembly (3,4,34). The device is most advantageous in that it is readily useable for both simultaneous and sequential spectroscopy.
Abstract in simplified Chinese:本发明揭示一种光电子模块,其包含一光导,该光导经配置以接收诸如周围光或由一对象反射之光之光。该光导具有包含多个区段之一绕射光栅,该多个区段中之每一者经调谐至一各别波长或窄波长频带。该模块进一步包含多个感光组件,该多个感光组件中之每一者经配置以接收由该绕射光栅之该等区段中之一各别者绕射之光。该模块可举例而言集成为一光谱仪或其他设备之部分以用于以光学方式判定一对象之特征。
Abstract in simplified Chinese:一种光学设备包括:一影像形成光学系统,其形成来自一对象之光之一影像;一成像单元,其接收借由该影像形成光学系统形成之该影像之光;一反射分光设备,其覆盖该成像单元之一成像区域中之一给定区域;及一光谱侦测单元,其侦测借由该反射分光设备反射之光的一分光光谱。
Abstract in simplified Chinese:一种用于对自一半导体晶圆分离之一半导体激光条上的复数个外部共振腔半导体激光芯片自动进行特性分析之系统及进程。该系统包括:一绕射光栅,该绕射光栅安装于一旋转平台上以用于在一定范围之绕射角度内旋转该绕射光栅;一转向镜,该转向镜安装于该旋转平台上且经定向而垂直于该绕射光栅之一表面;以及一激光分析器;以及一激光条定位平台。该定位平台自动地以每次一个芯片地移动,使该平台上之一激光条中的每一激光芯片与该绕射光栅对准,使得自该激光条中之一激光芯片发射之激光射束的一部分借由该光栅之一阶绕射而反射回至同一激光芯片,以锁定激光发光波长,且由该转向镜反射之该激光射束之其余部分,由该激光分析器接收且进行特性分析。对于每一激光芯片,该旋转平台以相对于该激光芯片发射之该激光射束之一定范围的绕射角度自动旋转,以旋转该绕射光栅,且该激光分析器对每一绕射角度下之诸如光谱、功率或空间模式之激光光学性质自动进行特性分析。
Abstract:
An optoelectronic module includes a light guide arranged to receive light, such as ambient light or light reflected by an object. The light guide has a diffractive grating that includes multiple sections, each of which is tuned to a respective wavelength or narrow band of wavelengths. The module further includes multiple photosensitive elements, each of which is arranged to receive light diffracted by a respective one of the sections of the diffractive grating. The module can be integrated, for example, as part of a spectrometer or other apparatus for optically determining characteristics of an object.
Abstract:
Disclosed is a diffraction grating spectrometer. The diffraction grating spectrometer obtains the high spectral resolution by using diffraction gratings having a smaller number of grating lines and low grid density. In the diffraction grating spectrometer, a beam diffracted from a small-size diffraction grating is expanded through the intensity division and wave front reconstruction by using an intensity division/wave front reconstruction unit to obtain the spectral resolution realized by a large-size diffraction grating, so that the size of the diffraction grating spectrometer is reduced.