Scanning Lenses, SES/15/xxx Series
SES/15.. series of scanner lenses are mounted versions of the single-element range of scanner lenses,
type ’48TSL’ described in data section 10.12. They are intended for use with laser beams up to 15mm
diameter, and are supplied complete in a mechanical housing.
The mechanical fitting is identical to that of the 2-element lenses described in data section 10.22,
and the design mirror locations are also identical.
Suitable scanner mirrors are:-MSM-1-1630 plus MSM-2-3330.
A full range of standard focal lengths, from 75mm to 300mm, is available.
Construction : ZnSe element, in black-anodised aluminium housing.
Input clear aperture : 46mm diameter, all models.
Transmission : >99% typically.
Coatings : AR coated for 10.6μm.
Diameter/length : See table 10.211 and fig. 10.212.
Mounting : M65 x 1 male thread, 6mm long.
Design S1 value : 17.1mm.
Notes on table 10.211
(1) WD is stated for the optimum image plane, and refers to the rear mounting flange as reference
(2) Spot sizes are stated for a 15mm diameter TEM00 beam, and refer to 1/e2 intensity points.
(3) Field sizes correspond to nominal beam scan angle of ±20°.
(4) Stated focal length is actual value, (not a nominal figure).
See figure 10.212.
Suitable scanner mirrors are: MSM-1-1630 plus
Material, coatings and quality
Only full-specification laser-grade ZnSe is used in SES/15/xxx series lenses.
All surfaces are polished to better than 1/100th wave spherical accuracy and
1/400th wave ovality as determined over the specified beam diameter.
Surface roughness is better than 2nm (RMS), and centration to better than 0.05mm ETV.
The lenses are anti-reflection coated with
a reflectivity of <0.25% per surface.
The SES/15/xxx series lenses may be used as direct plug-in alternatives to the MSL/2/15/xxx series
2-element lenses where the optimum in spot size and F-theta performance is not required