The most common type of Achromat is the Achromatic doublet, which is composed of two individual lenses made from glasses with different amounts of dispersion. Typically, one element is a negative (concave) element made out of flint glass such as F2, which has relatively high dispersion, and the other is a positive (convex) element made of crown glass such as BK7, which has lower dispersion.
They deliver high performance when the application involves small fields of view, typically up to 6 degrees. Their image quality surpasses that of singlets
Typical applications where achromatic doublet lenses are used are imaging, analyzers, fiber-optic lighting, laser range finders endoscopes and borescopes.
All standard achromatic lenses that Optica manufactures are supplied with MgF2 single layer anti-reflective coatings on both outside surfaces. Their performance is superior to that of all single element lenses.
Optica also manufactures custom optical elements, including:
• Negative achromats
• Lenses designed for finite conjugate systems
• Lenses whose designs have been optimized for other wavelength areas, such as the ultraviolet or near infrared
|Achromatic lens||These lenses have considerably reduced values of spherical aberrations. Best used to replace single components where performance must be improved.||Combinations of Two Optical Grade Glasses|
|Diameter Size||10mm To Maximum|
|Thickness Tolerance||+0.0, -0.03mmn|
|Angle Of Incidence||45`|
|Effective Focal Length||+or-2%|
|Surface Quality||60/40 scratch and dig|
- Other Diameter / Thickness Available on Request
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