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Speckle reducer SK-11

When a coherent light source illuminates an object, speckle noise appears and degrades your important images. This phenomena occurs due to the coherence of the light and seems to be inevitable.

SK-11 reduces speckle noise and improves your image quality. SK-11 consists of a fiber bundle of different length fibers. The input laser beam with high coherence emerges from SK-11 with lower coherence because the length of the each fiber differs more than the coherent length.

PDFSK-11 PDF [989K]

Speckle reducer SK-11
▲Speckle reducer SK-11
 

Application

SK-11 is excellent for microscope illumination. Monochromatic illumination does not cause any chromatic aberration from the objective lens. SK-11 has no moving parts so that you will not suffer from the vibration noise. Scanning system is not required, making it suitable for the temporal resolved imaging.

SK-11 also works as a beam homogenizer. The input Gaussian intensity profile is transformed into a homogeneous profile.

References:
- Dingel, Kawata, et al., Optik, 94 (1993) 132.
- Dingel, Kawata, Opt. Commun., 93 (1992) 27.
with SK-11
▲with SK-11

without SK-11
▲without SK-11
 

Specifications

Wavelength : 450 nm - 950 nm
(Option: 1000 nm - 1400 nm, 250 nm - )
Entrance pupil : 5 mm (ask for different diameter)
Exit pupil : 5 mm (the same with entrance pupil)
Transmission : > 50 % at 550 nm
Size : 110 (H) x 140 (W) x 55 (L)