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  • Products Name: Achromatic Lenses
  • Products Number: L006
  • Published: 2017-03-08
  • Inventory:
  • Views : 7

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Achromatic lenses are very common type of viewer lenses, they consist of two or more lense elements,which have been corrected for chromatic aberration with respect to two selected wavelengths, The elements must be fixed in relation to one another by either mounting or cement.

Achromatic Lenses are designed to specifically function within the infrared, visible, or ultra-violet wavelength ranges, and they are not symmetric devices. They must be installed with the correct front-to-back orientation (thicker element usually faces the eyes). If installed incorrectly, with the lens orientation installed backwards the result will be extensive distortion and aberration.

Design Wavelength:-----------------------------upon request                                                                                                                                      

Diameter Tolerance(mm): +0.0/-0.2 (General),+0.0/-0.2(High Precision)
Paraxial Focal Length Tolerance:-----------------------------------±2% 
Centration: ---------------------------------------------------------------<3 arc minutes 
Clear Aperture: --------------------------------------------------------->80%(small size) ,>95%(large size)
Surface Figure(per 25mm @ 632.8nm):-------------------------------------------<1.5λ, (General), <λ/4 (High Precision)
Irregularity ( @ 632.8nm)----------------------------------------------------------<λ/4 (General), <λ/10 (High Precision)
Surface Quality: --------------------------------------------------------60/40 (General), 10/5 (High Precision) 
Bevel:----------------------------------------------------------------------< 0.25 mm x 45° 
Coating:------------------------------------------------------------------ upon request 

Negative Acromatec Lenses  

Part No. f(mm) F(mm) R1(mm) R2=R3(mm) R4(mm) t c1(mm) t c2(mm) fb(mm) Lens A Lens B
ALN0201 -25.0 12.7 -15.6 13.09 44.16 3.0 2.67 -27.5 N-BK7 F2
ALN0202 -40.0 12.7 -24.45 17.97 66.6 3.0 2.34 -42.5 N-BK7 F2
ALN0301 -50.0 25.4 -31.19 24.89 85.31 3.0 4.22 -53.3 N-BK7 F2

Positive Achromatic Lenses  

Part No. f(mm) F(mm) R1(mm) R2=R3(mm) R4(mm) t c1(mm) t c2(mm) fb(mm) Lens A Lens B
ALP0101 15.0 6.0 8.831 -6.546 -19.77 2.71 1 13.066 N-BK7 N-SF5
ALP0102 20.0 6.0 12.356 -8.511 -24.38 2.6 1 18.288 N-BK7 N-SF5
ALP0103 25.0 6.0 15.704 -10.666 -29.99 2.3 1 23.455 N-BK7 N-SF5
ALP0104 30.0 6.0 18.88 -12.942 -36.48 1.9 1 28.695 N-BK7 N-SF5
ALP0105 25.0 8.0 15.596 -10.814 -30.48 2.9 1 23.125 N-BK7 N-SF5
ALP0106 30.0 8.0 18.88 -12.882 -36.22 2.7 1 28.277 N-BK7 N-SF5
ALP0107 20.0 10.0 12.3 -9.02 -25.23 3.6 1 17.625 N-BK7 N-SF5
ALP0201 25.0 12.0 15.346 -11.35 -31.92 4.2 1.3 22.286 N-BK7 N-SF5
ALP0202 25.0 12.7 15.596 -11.402 -31.05 4.3 1.3 22.251 N-BK7 N-SF5
ALP0203 30.0 12.7 18.535 -13.49 -37.84 4 1.3 27.36 N-BK7 N-SF5
ALP0204 40.0 12.7 25.23 -17.539 -48.75 3.4 1.3 37.778 N-BK7 N-SF5
ALP0205 50.0 12.7 31.26 -21.93 -62.37 3.1 1.3 47.992 N-BK7 N-SF5
ALP0206 60.0 12.7 37.33 -26.42 -75.86 2.8 1.3 58.127 N-BK7 N-SF5
ALP0207 75.0 12.7 46.77 -32.96 -94.62 2.6 1.3 73.227 N-BK7 N-SF5
ALP0208 65.0 20.0 40.09 -29.58 -83.59 6.3 2 60.868 N-BK7 N-SF5
ALP0301 60.0 25.4 37.33 -27.16 -75.86 7 2 55.565 N-BK7 N-SF5
ALP0302 120.0 25.4 73.28 -54.33 -159.96 4.2 2 117.103 N-BK7 N-SF5