File:BelOMO 10× achromatic triplet loupe 1.jpg

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English: BelOMO LP-3-10× achromatic triplet (jewellers') loupe. This loupe is made in Belarus and finished with black non reflecting surfaces and the lenses are fully multi-coated. A true triplet loupe has an optical system consisting of three compounded optical elements or lenses of different refractive indexes designed for optimal image quality. The Triplet lens-system is made up of two identical concave high index (flint glass) meniscus elements cemented to a double convex low index (crown glass) element and combines the aplanatic features of a distortion free sharp image with the color correction of an achromatic lens. A magnification of 10× is required and hence used by professionals for the examination and grading of precious gems and minerals.

Magnification ratio: 10 times
Optical schema: Achromatic Triplet
Focal distance: 28 mm (1.1 inch)
Linear field of view: 17 mm (0.67 inch)
Overall dimensions: 36 x 28 x 25 mm (1.54 x 1.1 x 0.98 inch)

Weight: 63 g (2.22 ounce)
Date
Source Own work
Author Francis Flinch

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Date/TimeThumbnailDimensionsUserComment
current13:37, 5 October 2016Thumbnail for version as of 13:37, 5 October 20162,560 × 1,920 (1.99 MB)Francis Flinch (talk | contribs)User created page with UploadWizard

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