Achromatic doublet lenses ("achromat") are designed to eliminate
chromatic
and spherical aberrations inherent in singlet lenses. When used
on-axis, an achromatic lens focuses an parallel input beam
to a perfect "point", limited only by the effects of diffraction. This performance can be achieved over a broadband of wavelength.
Achromatic lenses can be used to collimate and focus
laser beams. They can also be used for high-quality imaging on-axis.
However, the off-axis performance is significantly worse than the on-axis
performance. If your application requires good optical performance
off-axis as well as on-axis, multi-element lenses such as our
digital imaging lenses are recommended.
For more information, please visit Quality Achromatic Doublet Lenses.
For some applications it
is desirable to have a high-quality lens with a lower f/# (for example, collimating a diode laser with large
divergence angle). This can be done by adding a matching aplanatic
meniscus lens to a doublet lens. An aplanatic meniscus lens will
shorten the focal length of the doublet lens (thus, lowering the F-num) without
introducing additional spherical aberrations.
The following is the listing of our standard achromatic lenses.
They are all designed to achieve a wave-front aberration <1/4 wavelength.
You can also use lens design wizards to design custom achromatic
lenses.
Achromatic
elements have a Minimum Order Quantity (MOQ) ranging from 100 to 1,000 units.
Want more information on Optical Glass Domes? Feel free to contact us.
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General Specifications:
Parameter
Value
Default unit
mm
Material
Cemented crown and flint glasses
Focal length tolerance
+/-2%
Diameter tolerance
+0, -0.15mm
Center thickness tolerance
+/-0.25mm
Centration
3 arc min
Surface quality
40-20
Coating
Single layer anti-reflection coating centered at 550nm
PN:
ACH012-025
Description:
Achromatic doublet lens, D=12, EFL=25
Diameter:
12
EFL:
25
BFL:
22.06
Tc1:
3.76
Tc2:
2
Tc:
5.76
Te:
4.15
Radius1:
15.93
Radius2:
-12.75
Radius3:
-41.07
Material1:
N-BAK4
Material2:
N-SF10
Meniscus Lens:
Volume Price:
$31.40 (MOQ Range Applies) Request Volume Quote
Achromatic doublet lens is a kind of glass that can change the direction of light transmission and the relative spectrum of ultraviolet, visible or infrared light. In the narrow sense, achromatic bi-glued lens refers to achromatic bi-glued lens. Achromatic doublet lens can be used to fabricate lenses, prisms, mirrors and windows in optical instruments.
The difference between achromatic doublet lens and other glass is that it is a part of optical system and must satisfy the requirement of optical imaging. Therefore, the determination of the quality of achromatic doublet lenses also contains some special and stricter indicators.
1. Specific optical constants and consistency of optical constants of the same batch of glasses
Each kind of achromatic doublet lens has regular normative refractive index values for different wavelength light, which is the basis for optical planners to plan optical systems. Therefore, the optical constants of achromatic doublet lenses produced by factories must be within the allowable error range of these values, otherwise the imaging quality in practice will be inconsistent with the expected results in planning and the quality of optical instruments will be affected.
2.High transparency
The brightness of optical system imaging is proportional to the transparency of glass. The transparency of achromatic doublet lens to a certain wavelength of light is expressed in terms of light absorption coefficient K_ lambda. When light passes through a series of prisms and lenses, some of its energy is lost by the reflection of the interface of the optical parts, while others are absorbed by the medium (glass). Therefore, the primary way to improve the transmittance of an optical system with multiple thin lenses is to reduce the reflection loss of the lens surface, such as coating the antireflective film on the lens surface.
Each kind of achromatic doublet lens has regular normative refractive index values for different wavelength light, which is the basis for optical planners to plan optical systems. Therefore, the optical constants of achromatic doublet lenses produced by factories must be within the allowable error range of these values, otherwise the imaging quality in practice will be inconsistent with the expected results in planning and the quality of optical instruments will be affected.The brightness of optical system imaging is proportional to the transparency of glass. The transparency of achromatic doublet lens to a certain wavelength of light is expressed in terms of light absorption coefficient K_ lambda. When light passes through a series of prisms and lenses, some of its energy is lost by the reflection of the interface of the optical parts, while others are absorbed by the medium (glass). Therefore, the primary way to improve the transmittance of an optical system with multiple thin lenses is to reduce the reflection loss of the lens surface, such as coating the antireflective film on the lens surface.
If you are looking for more details, kindly visit Silicon Domes.
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