14 Aug 2006 Ultiquest Technologies also offers BK7 Dove Prisms and Roof prisms with low cost. For more, pls refer to http://www.ultiquestcom.com/products/optics/prisms_dove.html Dove prism has two applications. The main application is used as a rotator. It can rotate an image but without deviating the beam. And when the prism is rotated about the input parallel ray through some angle, the image rotates through twice that angle. It is very important that the application must be used with parallel or collimated beam and the large square reflective surface should be kept very clean. Another application is used as a retroreflector. For this application it perform as a right-angle prism.
Roof prism is combined with a right angle prism and a totally internally reflecting roof and they are attached by them largest square surfaces. It can invert and reverse an image, also, deflect the image 90°. Therefore, it is often used in terrestrial telescopes, viewing systems and rangefinders.
For more prisms information, pls link to http://www.ultiquestcom.com/products/optics/prisms.html
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