Achromatic Lens is an achromatic consists of a positive low-index Crown Glass lens element cemented to a negative high-index Flint Glass lens element. China Star Optics can provide Positive Achromatic Lens and Negative Achromatic Lens by two piece single lens (Doublets) or three piece single lens (Triplet).
Specification of our achromatic lens as follow:
*Material:BK7,ZF2,ZF7(or according to your request)
*Dia.:+0/-0.05
*Center thickness tolerance:+/-0.1
*Surface quality: 60-40 Scrath/Dig
*Surface figure:0.5-0.2
*Centration < 3arc min
*Chamfer:0.1-0.25*45 degrees
*Design wavelength:486.1mm,587.6mm,656.3mm
(the parameter is dimension of normal lens,so specification will be changed according to different dimension and material)
Achromat doublet lenses have significantly
better optical performance than singlet
lenses in visible imaging and laser beam
manipulation applications.it consists of
a positive low-index Crown Glass lens element
cemented to a negative high-index Flint Glass
lens element. The elements are chosen so as
to cancel chromatic aberration at two
well-separated wavelengths, usually in the blue
and red region of the spectrum. Focal length
is constant at those two wavelengths and focal
length shifts are virtually eliminated across
the visible wavelengths. One frequent use is
to achieve diffraction limited focusing of a
laser beam. Negative Achromat is typically used
when there is a need to eliminate chromatic aberration.
In addition to reducing chromatic aberration at
the design wavelengths, spherical aberration
and coma are greatly reduced. We always make
our achromats as precise specifications and
tolerances for uncompromising image quality upon
customer's requirement.
Specification of our achromatic lens as follow:
*Material:BK7,ZF2,ZF7(or according to your request)
*Dia.:+0/-0.05
*Center thickness tolerance:+/-0.1
*Surface quality: 60-40 Scrath/Dig
*Surface figure:0.5-0.2
*Centration < 3arc min
*Chamfer:0.1-0.25*45 degrees
*Design wavelength:486.1mm,587.6mm,656.3mm
(the parameter is dimension of normal lens,so specification will be changed according to different dimension and material)
Achromat doublet lenses have significantly
better optical performance than singlet
lenses in visible imaging and laser beam
manipulation applications.it consists of
a positive low-index Crown Glass lens element
cemented to a negative high-index Flint Glass
lens element. The elements are chosen so as
to cancel chromatic aberration at two
well-separated wavelengths, usually in the blue
and red region of the spectrum. Focal length
is constant at those two wavelengths and focal
length shifts are virtually eliminated across
the visible wavelengths. One frequent use is
to achieve diffraction limited focusing of a
laser beam. Negative Achromat is typically used
when there is a need to eliminate chromatic aberration.
In addition to reducing chromatic aberration at
the design wavelengths, spherical aberration
and coma are greatly reduced. We always make
our achromats as precise specifications and
tolerances for uncompromising image quality upon
customer's requirement.