doublets-triplets-standard-achromats.jpg

Standard Achromats

These lenses consist of two optical elements, usually of crown and flint glass types, cemented together to form an achromatic doublet. Most often, the crown lens is a biconvex positive lens. Due to the difference in refractive indices, chromatic aberration with respect to two selected wavelengths has been corrected. The lenses have been corrected for on-axis spherical aberration as well. Achromatic doublets are used as telescope objectives, eye loupes, magnifying glasses and eyepieces. Achromatic doublets have also been used to focus and manipulate laser beams because their image quality is superior to single lenses.

Diameter Dia. Tolerance CT Tolerance Centering Irregularity Surface Quality Bevel
6.00-25.00 +0.00 / -0.10 ±0.2 < 3 minutes 0.5 Waves 40-20 0.25 x 45°
25.01 - 50.00 +0.00 / -0.10 ±0.2 < 3 minutes 0.5 Waves 60-40 0.50 x 45°
>50.00 +0.05 / -0.10 ±0.2 3 - 5 arc min. 1.0 Waves 60-40 0.50 x 45°
Dimensions MM
Clear Aperture CA >= 90% of Diameter
Coating 1/4wave MgF2 @ 550nm (See Coating Chart for Available Options)
Design Wavelength 587.6nm
Focal Length Tolerance ±2%
Edge Thickness Reference
* All dimensions are in mm

Viewing 151 to 180 (310 Total)
Sort by:
Part Number
Diameter
Effective Focal Length
Back Focal Length
Center Thickness
Edge Thickness
L-AOC161
25.0000
45.0000
39.5300
10.89
7.1000
rfq_spacer
L-AOC162
25.0000
60.0000
53.6100
11.4
8.8000
rfq_spacer
L-AOC163
25.0000
69.9000
65.2200
9
6.3000
rfq_spacer
L-AOC164
25.0000
75.0000
70.4100
9.5
7.0000
rfq_spacer
L-AOC165
25.0000
80.0000
75.7700
8.5
6.2000
rfq_spacer
L-AOC166
25.0000
85.0000
81.1200
8.01
6.1000
rfq_spacer
L-AOC167
25.0000
100.0000
95.9000
7.5
5.7000
rfq_spacer
L-AOC168
25.0000
105.0000
101.4200
6.7
4.9000
rfq_spacer
L-AOC169
25.0000
120.0000
114.8100
9.6000
8.1000
rfq_spacer
L-AOC170
25.0000
125.0000
120.9300
8.4
6.9000
rfq_spacer
L-AOC171
25.0000
150.0000
146.1500
7.9
6.7000
rfq_spacer
L-AOC172
25.0000
160.0000
156.8800
6
4.9000
rfq_spacer
L-AOC173
25.0000
170.4000
166.8500
6.4000
5.3000
rfq_spacer
L-AOC174
25.0000
175.0000
172.7100
5.5
4.6000
rfq_spacer
L-AOC175
25.0000
200.0000
197.0600
5.6
4.7000
rfq_spacer
L-AOC176
25.0000
225.0000
222.6200
5.5
4.7000
rfq_spacer
L-AOC177
25.0000
250.0000
247.0000
5.3
4.6000
rfq_spacer
L-AOC178
25.0000
300.0000
297.6300
5.5
4.9000
rfq_spacer
L-AOC179
25.0000
400.0000
397.2100
5
4.5000
rfq_spacer
L-AOC180
25.4000
50.1000
44.8300
10.9
7.0000
rfq_spacer
L-AOC181
25.4000
80.0000
76.0100
7.3
4.9000
rfq_spacer
L-AOC182
25.4000
100.0000
95.9000
7.5
5.6000
rfq_spacer
L-AOC183
25.4000
120.0000
115.1700
9.6
8.0000
rfq_spacer
L-AOC184
25.4000
125.0000
121.6000
7.3000
5.8000
rfq_spacer
L-AOC185
25.4000
160.0000
156.8800
6.0000
4.8000
rfq_spacer
L-AOC186
25.4000
200.0000
197.0600
5.6
4.7000
rfq_spacer
L-AOC187
25.4000
250.0000
247.2700
5.3
4.6000
rfq_spacer
L-AOC188
25.4000
400.0000
397.4100
5
4.5000
rfq_spacer
L-AOC189
29.0000
58.0000
53.0000
9
5.7000
rfq_spacer
L-AOC190
29.0000
76.0000
70.9300
10.0000
6.6000
rfq_spacer