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.

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Part Number

Diameter

Effective Focal Length

Back Focal Length

Center Thickness

Edge Thickness

L-AOC221

38.1000

250.0000

243.8600

11.5

9.8000

L-AOC222

38.1000

280.0000

275.5900

9.5

8.0000

L-AOC223

50.8000

600.0000

595.4700

9.3000

8.1000

L-AOC224

40.0000

60.0000

50.3200

17.46

10.0000

L-AOC225

40.0000

70.3000

61.6200

17.2000

10.2000

L-AOC226

40.0000

80.0000

70.7700

16.07

11.8000

L-AOC228

40.0000

100.0000

94.0500

12

7.1000

L-AOC229

40.0000

140.0000

134.8600

10.14

7.1000

L-AOC230

40.0000

150.1000

144.2700

10.9

7.7000

L-AOC231

40.0000

160.0000

155.2400

9.43

6.8000

L-AOC232

40.0000

169.7000

164.2800

10.3

7.5000

L-AOC233

40.0000

237.8000

233.2100

9.0000

7.1000

L-AOC234

40.0000

249.1000

244.1900

8.8

6.9000

L-AOC235

40.0000

300.0000

295.5100

9.32

7.9000

L-AOC236

56.5000

360.0000

349.1100

17

14.4000

L-AOC237

40.0000

350.0000

347.4900

7.3

5.9000

L-AOC238

25.4000

60.0000

53.3700

9.5

6.3000

L-AOC239

30.0000

120.0000

116.2900

10.68

8.4000

L-AOC240

40.0000

400.0000

397.2800

8

7.1000

L-AOC241

40.0000

450.0000

446.3200

8.2

7.3000

L-AOC242

82.0000

300.0000

290.5900

19.6000

13.7000

L-AOC243

42.0000

105.0000

97.2700

14.1

10.3000

L-AOC244

33.0000

100.0000

94.6300

11.1

7.8000

L-AOC245

45.7000

179.0000

166.1900

20.0000

17.3000

L-AOC246

47.0000

125.0000

118.8300

12.0000

6.7000

L-AOC247

49.0000

75.0000

62.9700

21.8

11.5000

L-AOC248

50.0000

81.0000

69.1000

22.9

13.4000

L-AOC249

50.0000

100.0000

89.7900

18.75

11.0000

L-AOC250

50.0000

120.0000

110.5800

17.5

11.3000

L-AOC251

50.0000

150.7000

142.5800

15.5

10.5000