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This unit is valued at $43,000 new... This information was copied from the Davidson Optronics Website: http:// /catD-897.htm AUTOMATIC AUTOCOLLIMATOR - D-897 Davidson Optronics recommends the Model D-897 Automatic Autocollimator for use in laboratories that require a high degree of sensitivity (down to ±0.01 arc seconds). This unprecedented degree of precision will undoubtedly improve your laboratory's ability to make ultra-fine angular deflection measurements. * First instrument able to repeat automatic readings to ±0.01 arc seconds * 5-10 times more sensitive for closer, more accurate readings * Continuous electrical servo output records and controls * All solid state electronics with modular design facilitates repair * Digital display corresponding to the target reflector angle The Model D-897 Automatic Autocollimator is an updated version of the Model D-800 which was the first Automatic Autocollimator capable of delivering automatic repeatable measurements down to ±0.01 arc seconds. 0.01 arc second is equivalent to the angle subtended by a quarter (25› coin) viewed from 325 miles away. This illustrates the high degree of precision that the Model D-897 Automatic Autocollimator is capable of delivering. The basic function of an autocollimator is to detect and measure a deviation in the position of a reference reflective surface. The autocollimator projects a collimated beam of light onto a reflective surface. When a deviation in the position of that reflective surface occurs, a deviated beam of collimated light returns to the autocollimator. A direct angular reading autocollimator, such as the Model D-897 Automatic Autocollimator, will provide a direct angular measurement of the reflective surface deviation through acquisition and measurement of the deviated return beam angle. For theory of operation, please refer to the Principles of Autocollimation Application Note. ±0.01 arc second over 10 arc seconds (with minimum 1.0" diameter reflector) Automatic Tracking Response Time 4 arc seconds per second of time The digital volt meter with LED display corresponds to the angular deflection Full scale will compare to the visual dial. It can also be used to provide an RS-232 output signal. Allows the Model D-897 to be used as an electronic signal autocollimator. The dial rotates until meter is nulled. Dial reading then corresponds to target reflector deflection. Varies with time constant control Located on front panel of electronics unit Accurate to 0.75% of the total range Visual indication of angular deviations 10 complete 1 arc second turns Illuminates when image is within the acquisition range 3 degrees elevation adjustment NOTE: The specifications and description contained in this bulletin also pertain to the Model D-896 Dual Axis Automatic Autocollimator. which measures in both azimuth and elevation. * P/N 105-1962 Logic Board allows one to align the target reflector without having to constantly look through the eyepiece. Provides a binary coded signal corresponding to acquired left, null, acquired right, not acquired and off. * P/N 105-1963 D.C. Error Signal option provides a D.C. voltage output (for small angles) that corresponds to the target reflector's deviation. Please email if you have any questions. We have the cord to connect the autocollimator to the electronic box. However, we do not have the cord for the electronic box to power. It appears to be a standard 5pin Mil-Standard plug. This unit has therefore not been tested for power. If you would like to speak with someone in person, email us. (We do not proofread any ads submitted by members) |
TerranceElliott@desmoines-classifieds.com (Terrance Elliott) for more information. Your emails will be instantly forwarded to the poster's private address.
