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<strong>Telecentric</strong> F-<strong>Theta</strong> <strong>Lenses</strong><br />
<strong>Telecentric</strong> F-<strong>Theta</strong> <strong>Lenses</strong>,<br />
focal length 100 mm,<br />
wavelengths 532 nm and 1064 nm.<br />
For the first time, LINOS offers a telecentric<br />
design. Adding telecentricity to<br />
the F-<strong>Theta</strong> design offers greater depth<br />
of field when marking objects for laser<br />
material processing.<br />
Focal length 100 mm for wavelengths<br />
532 nm and 1064 nm, entrance beam<br />
bundle diameter 15 mm, deviation from<br />
telecentry < 0.9%, usual M85x1 thread.<br />
LINOS Photonics presents<br />
another line of F-<strong>Theta</strong><br />
lenses.
Application Data<br />
m1<br />
M1<br />
A<br />
FFL<br />
flange focal length<br />
image plane<br />
• The mirror distances m1 and m2 are<br />
recommended values<br />
• The overall scan angle Ñ refers to<br />
the maximum diagonal scan angle<br />
• The scan length can be calculated<br />
with the formula:<br />
M2<br />
<br />
last surface<br />
(lens element or<br />
protective glass)<br />
BFL<br />
øspot<br />
y’<br />
2y‘= EFL x 2 x π/180<br />
2y‘: scan length or diagonal [mm]<br />
EFL: effective focal length [mm]<br />
2: overall scan angle [°]<br />
π/180: conversion factor from<br />
degrees to radians<br />
m2<br />
back focal length<br />
øbeam<br />
first surface<br />
<strong>Telecentric</strong> F-<strong>Theta</strong> <strong>Lenses</strong><br />
Nominal focal length [mm]<br />
Effective focal length EFL<br />
[mm]<br />
Wavelength [nm]<br />
Back focal length (from vertex of<br />
last element or from protective<br />
glass surface) BFL [mm]<br />
Flange focal length (distance from<br />
mechanical flange to focus plane)<br />
FFL [mm]<br />
Scan length or diagonal for area<br />
scans 2y‘ [mm]<br />
Overall scan angle Ñ [°]<br />
Entrance beam bundle diameter<br />
Øbeam [mm]<br />
Image point diameter<br />
(1/e2) for Gaussian illumination<br />
[μm]<br />
Mirror distances m1/m2 [mm]<br />
Screw thread or lens diameter<br />
Order number<br />
100.0 100.2 532.0 129.5 195.8 77.0 ± 22.0 15.0 7.0 32.2/20.0 M85x1 4401-461-000-21 PG<br />
100.0 100.1 1064.0 128.9 195.2 76.9 ± 22.0 15.0 13.0 20.0/32.0 M85x1 4401-464-000-21 PG<br />
PG<br />
means including an anti-reflection coated protective glass for 1064 nm + VIS.<br />
F-<strong>Theta</strong> lens condition is satisfied with a precision of 3.4% for all telecentric F-<strong>Theta</strong> lenses.<br />
Deviation of telecentricity < 0.9%.<br />
www.linos.com<br />
LINOS Photonics GmbH & Co. KG<br />
Munich, Germany<br />
Phone +49 (0)89 72 02-285<br />
E-mail lis@linos.de<br />
LINOS Photonics SARL, France<br />
Phone +33 (0)4 72 52 04 20<br />
E-mail info-fr@linos.com<br />
LINOS Photonics Inc., USA<br />
Phone +1 (508) 478-6200<br />
E-mail info@linos.com<br />
LINOS Photonics Ltd., UK<br />
Phone +44 (0) 1908 262525<br />
E-mail sales@linos.co.uk
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