Holographic CS130 monochromators come with two holographic gratings that are installed and aligned on a grating mount. A high precision motor is used to select the desired wavelength and switch between diffraction gratings quickly, without sacrificing performance.

The optical design of the Cornerstone 130 is based on an out-of-plane version of an Ebert-Fastie monochromator. The input and output ports are in line with each other, simplifying system alignment. The optical configuration is designed to ensure high resolution and maximum throughput. This f/3.7 monochromator is optimized to provide excellent stray light rejection while minimizing aberrations. A high precision motor is used to select the desired wavelength and switch between diffraction gratings quickly, without sacrificing performance.

Fixed slits should be used for the utmost accuracy and repeatability, especially at high resolution. Fixed slits are the best option when only a few slit sizes are required, as they are less expensive. The fixed slits slide into the holder at the input port, as well as the holder at the lateral output port on dual output models. The width and height cannot be adjusted, but may be individually replaced with other slit sizes. Individual fixed slits are required and sold separately to allow customized choices based on the needs of the application (see accessory section). Order two identical fixed slits for the CS130 monochromator. The slit width is one of the factors determining the resolution and throughput of the instrument, with a narrow slit providing higher resolution and lower throughput.

Micrometer adjustable slits offer flexibility and high throughput, but are not as accurate or repeatable as fixed slits. The micrometer adjustable slit assembly is continuously variable from fully closed to 3 mm width. The narrowest practically achievable width is 4 µm. A height adjustment slide allows variation in the height from 2 to 12 mm. This type of slit is designed primarily for versatility and convenience in changing resolution and throughput.

All models include a connector to utilize the optional Model 74009 Hand Controller for manual operation without a computer. There is no need to memorize commands or key sequences. The backlit LCD display provides information on the grating selection, active filter selected, current wavelength and shutter status and more.

The CS130 is capable of automatically controlling the optional model USFW-100 filter wheel. These filter wheels hold up to six 1-inch diameter filters. Neutral density filters can be used for intensity adjustment. Order sorting filters may be installed to block higher order diffraction. The filter wheel can be mounted to the male flange of the monochromator slit or slit holder. The filters are mounted external to the monochromator.