Monochromators manufactured by holmarc are fully automated with microprocessor controls . These can be operated either from the front panel of the instrument or through a personal computer which can be interfaced with the device by using RS 232C serial port. The instrument is made user friendly by incorporating LCD display and keyboards. Input and output port of the monochromator is fitted with precise, micrometer controlled variable slits. Mirrors are kinematically mounted for fine tuning during installation and setup. The software developed for the instrument has facilities for setting up and calibration as well. System accepts input data as wavelength or wave number.

Monochromator consists of diffraction grating, slits and spherical mirrors, all held by precision opto-mechanical mounts. The input light source, which is always application depended, typically emits a broad spectrum of radiations. Diffraction grating disperses light by diffracting different wavelengths at different angles. The angular position of the grating is adjusted by use of rotary -