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Datasheet: ML-20-35 Manually Tunable Lens Update: 03.06.2014
Copyright © 2014 Optotune
Manually Tunable Lens ML-20-35
The curvature of the lens can be manually changed from convex to flat to concave by rotating the outer ring attached to the lens. The focal length is accordingly tuned to a desired value. Optotune currently offers four lens versions: x x x x
ML-20-35-VIS-HR: ML-20-35-VIS-LD: ML-20-35-NIR-HR: ML-20-35-NIR-LD:
High refractive index (nD = 1.559), visible anti-reflection coating (400 – 700 nm) High Abbe number (V = 100), visible anti-reflection coating (400 - 700 nm) High refractive index (nD = 1.559), visible anti-reflection coating (700 – 1100 nm) High Abbe number (V = 100), near infrared anti-reflection coating (700 – 1100 nm)
The following table gives the specification of our standard manual lens. Lens aperture, thickness and tuning range can be adapted on demand.
Mechanical specifications External diameter Clear aperture1 Thickness Weight Lifecycles Full tuning angle
35 20 8 11.35 >100‘000 112°
Optical specifications Focal length tuning range (typical) Optical power tuning range (typical) Optical power change per angular degree Dispersion nF (486.1nm) nD (589.3nm) nC (656.3nm) Abbe number V Lens type Transmission spectrum Optical damage threshold @ 1064nm Polarization
mm mm mm g
ML-20-35-VIS-HR ML-20-35-NIR-HR -40 … inf … +33 mm -25 … 0 … +30 Dpt 0.5 Dpt / °
ML-20-35-VIS-LD ML-20-35-NIR-LD -70 .. inf .. 50 mm -14.2 … 0 … +20 Dpt 0.3 Dpt / °
1.572 1.302 1.559 1.300 1.554 1.299 31 100 from plano-convex to plano-concave see Figure 2 10 kW/cm2 Preserving
Thermal specifications Storage temperature Operating temperature
[-40,+85] [-20,+65]
°C °C
Test conditions Lens diameter used for characterization Temperature
80 % of clear aperture 20° C
1
Recommended useful aperture is 80% of clear aperture Page 1 of 3
No representation or warranty, either expressed or implied, is made as to the reliability, completeness or accuracy of this paper.
W W W. S T E M M E R- I M A G I N G . C O M
Optotune AG | Bernstrasse 388 | CH-8953 Dietikon | Switzerland Phone +41 58 856 3000 | www.optotune.com |
[email protected]
Datasheet: ML-20-35 Manually Tunable Lens Update: 03.06.2014
Copyright © 2014 Optotune
Figure 1 shows the dimensions of the ML-20-35 lens. According to Fig. 1, the focal range is measured from the housing. The ring is used to set the focal range to the desired value.
focal length
Figure 1: Mechanical drawing (unit: mm) The materials used exhibit a transmission of over 90% in the range of 250 – 2500 nm. However, customized antireflection coatings may be needed for the cover glasses. Figure 2 shows the transmission spectrum for our two standard broadband coatings (visible and near infrared). 100 90 80
Transmission [%]
70 60 50 40 30
ML-20-35-VIS-LD (AR coating 400 - 700 nm) ML-20-35-VIS-HR (AR coating 400 - 700 nm)
20
ML-20-35-NIR-LD (AR coating 700 - 1100 nm)
10
ML-20-35-NIR-HR (AR coating 700 - 1100 nm)
0 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 Wavelength [nm]
Figure 2: Transmission spectrum of the ML-20-35 with standard broad-band coatings Page 2 of 3 No representation or warranty, either expressed or implied, is made as to the reliability, completeness or accuracy of this paper.
W W W. S T E M M E R- I M A G I N G . C O M
Optotune AG | Bernstrasse 388 | CH-8953 Dietikon | Switzerland Phone +41 58 856 3000 | www.optotune.com |
[email protected]
Datasheet: ML-20-35 Manually Tunable Lens Update: 03.06.2014
Copyright © 2014 Optotune
Examples of mounting possibilities for the ML-20-35 lens include:
G024504000 G061047000 http://www.qioptiq-shop.com/
CP03/M KM200V/M http://www.thorlabs.de/
NT03-676 http://www.edmundoptics.com/
O-OPTU11-06/2015 ∙ Subject to technical change without notice. No liability is accepted for errors which may be contained in this document.
For more information on optical and mechanical parameters, please contact
[email protected].
Page 3 of 3 representation or warranty, either expressed or implied, is made Optotune AG | Bernstrasse 388 | CH-8953 Dietikon | Switzerland STEMMER IMAGI NG Head Office Imaging isNo our passion. as to the reliability, completeness or accuracy of this paper. 9 - 13, D-82178 PuchheimPhone +41 58 856 3000 | www.optotune.com |
[email protected] Gutenbergstraße Phone: +49 89 80902-0,
[email protected] www.stemmer-imaging.com
