wavelengths
 

Reflection Filters

Select wavelengths by using 4 filter plates simultaneously. By tilting the pla­t­es the transmitted wavelength area can be selected with no change of the final beam direction.

Listed below are scanning range Δλ, half bandwidth HBW and transmission at peak maximum Tmax of standard REFs. The manufacturing of variable reflection filters is possible for a spectral range from 140 nm to 2000 nm.

Typically the scanning range is about 15% of the center wavelength, with rejection <10-4 from VUV to FIR and damage threshold similar to high power coatings.
 
Way of the beamLASEROPTIK offers two different housings to ad­just the black filter plates (NG1) between AOI 15° and 60°:
– a manually driven unit, equip­ped with plates 50 x 50 x 1 mm, and
– a stepper motor driven unit, controlled manually or by PC, with 70 x 50 x 3 mm.

Please ask for more details.

Coating types
REF
FILTER
  • LP
  • SP
  • NF
  • MP
  • BP
  • REF
REF
REF
Δλ [nm]HBW [nm]Tmaxmethodtype
180-200 12 80% EBE 1
235-275 18 90% EBE 1
  40 95% EBE 2
290-340 20 95% EBE 1
340-390 25 98% MS 1
500-585 30 98% IAD 1
750-880 60 98% IAD 1
1000-1150 60 95% IAD 1

All values are given for standard coatings. Customized coatings available for all types.

Coating methods available:

EBEIADIPMSIBS

Examples

If not mentioned otherwise, all values and diagrams are given

... for the standard substrate material used in the described wavelength area (mostly Fused Silica or CaF2).

... without consideration of the rear surface.

... with EBE coating technique for a good cost-performance ratio.

Customized coatings are available for all types.

 

–––– dashed lines show the zoomed curve with the stated magnification

REF 248 nm / 45° Type 2
[B-01931]REF 248 nm / 45° Type 2

248 nm: R4 > 95%, compensation of manufacturing
tolerance for wavelength by angle tuning necessary.

REF 266 nm / 45° Type 2
[B-04555]REF 266 nm / 45° Type 2

266 nm: R4 > 95%, compensation of manufacturing
tolerance for wavelength by angle tuning necessary.

REF 355 nm / 45° Type 1
[B-03442]REF 355 nm / 45° Type 1

355 nm: R4 > 95%, compensation of manufacturing
tolerance for wavelength by angle tuning necessary.

REF 532 nm / 45° Type 2
[B-06179]REF 532 nm / 45° Type 2

532 nm: R4 > 98%, compensation of manufacturing
tolerance for wavelength by angle tuning necessary.

Reflection Filter Housing
[M-00012; M-00042]Reflection Filter Housing

motor driven (left) [M-00012]
and manual adjustment [M-00042]

REF 532 nm / 45° Type 2
[B-06179]REF 532 nm / 45° Type 2

532 nm: R4 > 98%, compensation of manufacturing
tolerance for wavelength by angle tuning necessary.

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