An achromatic doublet is the combination of positive and negative elements with different refractive indices. They are computer-optimized to correct for on-and off-axis spherical and chromatic aberrations. When these doublets are used to focus or collimate, the most steeply curved (shortest radius) surface should face the collimated light.
 
 
 
Material £º Optical Crown and Flint
Focal Length Tolerance: ¡À0.5%
Diameter Tolerance: +0/-0.1mm
Thickness Tolerance: ¡À0.2mm
Surface Flatness: lambda/4
Centration Error: <3 arcmin
Surface Quality:

40/20

Clear Aperture: >90% of central diameter
Coating: A single layer MgF2
 

Product Number

§¶

f'

f'b

tc

Material

TDA-12.7-15

12.7

15.0

10.7

7.8

BaF10+SF10/ZBaF5+ZF4

TDA-15.0-40

15.0

40.0

35.5

7.6

BaF10+SF10/ZBaF5+ZF4

TDA-18.0-52

18.0

51.8

48.9

6.2

BaF10+SF10/ZBaF5+ZF4

TDA-19.0-100

19.0

100.0

96.8

7.0

BK7A+SF5/K9+ZF2

TDA-25.4-89

25.4

89.0

85.9

7.5

BK7A+SF5/K9+ZF2

TDA-25.4-100

25.4

100.0

96.1

8.5

BK7A+SF5/K9+ZF2

TDA-25.4-150

25.4

150.0

146.4

7.9

BK7A+SF5/K9+ZF2

TDA-25.4-300

25.4

300.0

297.9

6.0

BK7A+SF15/K9+ZF11

TDA-25.4-500

25.4

500.0

498.1

6.0

BK7A+SF5/K9+ZF2

TDA-44.2-250

44.2

250.0

244.9

11.7

K3+SF15/K10+ZF11

TDA-44.2-300

44.2

300.0

295.1

11.7

K3+SF15/K10+ZF11

TDA-44.2-400

44.2

400.0

396.1

10.0

BK7A+SF5/K9+ZF2

 
¡¤All dimensions are in mm unless otherwise specified.
¡¤Other sizes are available upon request.