Hahn & Kolb

1 0 2 4 ● = ON STOCK AT HEADQUARTERS ○ = NO STOCK I TEM Magnifying lenses and technical endoscopy \ Magnifying glasses Biconvex lens system Biconvex lens system lenses are lenses with two convex surfaces. It is the simplest and most commonly used lens shape for magnifiers. In contrast to biconvex lenses, plano-convex lens have one convex and one flat surface. Plano-convex lenses are used in aplanatic lens systems. (See aplanatic lens system). Aspheric lens system The surfaces of a spherical lens correspond to a section of the surface of a sphere. In contrast, aspheric lenses deviate from this spherical shape. Comparatively higher magnifications can be achieved using aspheric lenses as the defects that inevi- tably occur in any image produced by lenses are minimised. Aplanatic lens system Aplanatic lens systems consist of 2 plano-convex lenses, where the convex sides face each other internally. This allows a larger, field of vision with sharp edges at a relatively high magnification. Achromatic lens system Achromatic lens systems consist of at least 2 cemented lenses. The facing sides must have the identical opposite cur- vature. The lenses consist of crown and flint glass. Achromatic lenses deliver transparent images to the edge of the visual field, even for high-contrast objects. Magnifiers and reading glasses Lens systems Application: For magnifying small objects Execution: No. 41100: Glass lens in plastic frame No. 41120: Glass lens in metal holder Nickel-plated brass cover panels No. 41125: Glass lens in plastic holder Nickel-plated brass cover panels No. 41130: Dust-proof plastic housing Advantage: No. 41130: Precision magnifying glass for pin-sharp images free from chro- matic aberration No. 41130 No. 41125 No. 41120 No. 41100 Folding pocket magnifiers Magnification Lens Ø (mm) Lens design Lens material 41100... 3,5-times 55 Biconvex Glass Ident. No. Price/unit, € 011 ● 41120... 6-times 23 Aplanatic Glass Ident. No. Price/unit, € 011 ● 41120... 8-times 23 Aplanatic Glass Ident. No. Price/unit, € 021 ● 41120... 10-times 23 Aplanatic Glass Ident. No. Price/unit, € 031 ● 41120... 15-times 18 Aplanatic Glass Ident. No. Price/unit, € 051 ● 41120... 20-times 18 Aplanatic Glass Ident. No. Price/unit, € 061 ● 41125... 3/6/9-times 30 Biconvex Glass Ident. No. Price/unit, € 011 ● 41130... 3/6/9-times 23 Achromatic Glass Ident. No. Price/unit, € 010 ● ESCHENBACH = Prod. Gr. 4AA ORION = Prod. Gr. 454 a = Prod. Gr. 490 41140... Ident. No. Price/unit, € 025 ● Prod. Gr. 490 Magnifying glass Application: For magnifying small objects, e.g. for quality control during production. Execution: Nickel-plated brass frame Round aluminium handle with recessed grips Technical data: Magnification: 2,5-times Lens diameter: 75 mm Lens design: Biconvex