Terahertz Technologies Inc. C995 Optical Chopper
The C-995 is a microprocessor-based control system that utilizes direct-digital-synthesis to deliver precise optical chopping rates from 4 Hz to 5000 Hz. Equipped with a large five-digit LED readout, the C-995 controller enables digital entry of the desired chopping rates from the front panel. Additionally, the C-995 is equipped with a bidirectional Rs-232 port that permits the user to set the desired chopping rate to a resolution of .001 Hz and to read the status of the instrument.
The C-995, designed with a phase-locked-loop control system, allows the chopping rate to also be synchronized to a user-supplied external clock ranging from 4 Hz to 5 KHz. The controller is then used to measure and display the frequency of the external clock.
The C-995 chopping head is attached to the controller by means of a 10 foot coiled cord. The precision etched blade is fully enclosed for protection from inadvertent damage. (An optional open blade version is also available.)
There are two apertures and two sections (30 slots and 3 slots) for the high and low frequency ranges, espectively. The aperture diameter is 15 mm with a slot width of 4.5 mm (30 slot section) or 30 mm (3 slot section). The small 4.75 inch square outline and two inch maximum depth permits easy integration into compact optical setups. Dual #8-32 mounting holes permit the apertures to be placed at a height as low as 0.75 inches above an optical bench, or with the included 1/2 inch rod and stand, as high as 13 inches above the mounting surface.
- Chopping Rates: 4 to 5000 Hz
- Frequency Resolution: 0.001 Hz
● Large 5 Digit LED Display
● Frequency resolution of 0.001 Hz
● External Clock Synchronization
● Covers 4 Hz to 5 KHz with only one blade
● Computer Interface for easy control
● Enclosed Chopper Blade
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