BS ISO 17328:2014 pdf free
BS ISO 17328:2014 pdf free.Optics and photonics一Optical materials and components一Test method for refractive index of infrared optical materials
The collimating unit is a unit for collimating the monochromatic light beam from the entrance slit or from the entrance pinhole of the wavelength selecting unit. It consists of reflecting optics to avoid errors caused by chromatic aberration of the optics.
The goniometer consists of a rotating stage and a rotating arm. It has a function for reading a rotation angle of the rotating arm. The rotating stage holds the specimen prism at the position where the entrance face of the specimen prism is illuminated by the monochromatic light beam from the collimating unit and rotates the specimen prism. The rotating arm rotates a focusing unit and a detector unit.
The rotating axis of the rotating stage and the rotating axis of the rotating arm are parallel to the ridge line defined by the entrance face and the exit face of the specimen prism. The holder of the specimen prism has an adjusting mechanism for tilting.
The plane of section, PS, of the specimen prism is maintained parallel to the monochromatic light beam.The plane, PS, is defined as a plane normal to the ridge line of the specimen prism.
The focusing unit focuses the monochromatic light beam refracted by the specimen prism and forms the image of the exit slit or the exit pinhole of the wavelength selecting unit. The focusing unit is placed on the rotating arm of the goniometer.
As shown in Figure A.2, the slit or the pinhole is placed on the focal plane of the focusing unit, and then the monochromatic light beam through the slit or the pinhole is detected by the detector unit. If necessary, relay optics can be put between the slit or the pinhole and the photodetector to focus the monochromatic light beam on the photodetector. Many other valid or even preferred configurations are also available.BS ISO 17328 pdf download.
