Scanning Lenses, SES/15/xxx Series

IntroductionSingle Element Lens
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.
Technical Specifications
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.

Single element diagram

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).
Mirror locations
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

[laser specification] ultra-low absorption thin films giving
a reflectivity of <0.25% per surface.
Application note
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

Single element lens data