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Newport offers three basic achromats. Two are cemented and the third type is air spaced.
All types are offered in a 4inch, 6 inch and 8 inch diameter and are not polished. Each achromat set can be purchased with or without the glass tooling. The blanks and the tooling have been machined to the starting curve. They require additional grinding, polishing and coating. After the lens are finished, they have to be assembled together either through a cementing process or by the construction of a ceil to hold the air spaced lens at the proper distance from each other.
The cemented achromats are of two types, i.e., either as an f/10 or as an f/14.1. A complete kit comes with the two lens blanks and two tools. Because there is a common mating surface on each blank (one with a convex surface and one with a concave surface), these two surfaces are ground and polished against each other. The opposite surfaces are ground and polished with the enclosed tools. The design for both systems was contributed by Max Bray, Phoenix, Arizona.
The air spaced achromat is an f/15 doublet. A complete kit comes with two lens blanks and four glass tools. The design for this optical system is based on an article written by James G. Baker which was published in Applied Optics, Vol.2, No.2, February 1963, pp. 111-130.
The fabrication tolerances for each achromatic blank is as follows: Radius tolerance is 1/20 %; finished thickness tolerance is +/-.010 of an inch.
In addition, custom achromat blanks can be provided based upon other designs. Please include the following information when requesting a quotation: the material type desired for each lens and the basic information as to the diameter, thickness, and curves required. A quotation will be provided based upon this information.
|Please note that these kits are not recommended for a person who has not polished glass or mirror blanks before. The chances of making a mistake are much greater and the cost for replacement materials are much higher. For discussions on the fabrication and the cementing of the lens blanks, please refer to the following articles:"How to Grind and Polish a Lens"by Max Bray and "Cementing Archromatic Lenses", Telescope Making 28, p. 16.|
|DIAMETER||THICKNESS||APERTURE||FOCAL LENGTH||CATALOG NO.||CROWN/FLINT|
FOR MORE INFORMATION PLEASE CONTACT US:Newport Glass Works, LTD.
P.O. BOX 127
STANTON, CA. 90680
Tel: (714)484-7500, (714)484-8100
Fax: (714)484-7600 or (714)484-8181
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