Method and apparatus for lossless beam shaping to obtain high-co

Details Method and apparatus for lossless beam shaping to obtain high-co Method and apparatus for lossless beam shaping to obtain high-co

1999-04-19

2000-10-24

Epps, Georgia

Optical: systems and elements

Single channel simultaneously to or from plural channels

359642, 359708, 359709, 359710, G02B 2710, G02B 300, G02B 302, G02B 306

Patent

active

061376329

ABSTRACT:
An axiconic telescope that receives a collimated input light beams and includes a first axicon and second axicon. Depending on the distance between the two axicons, the input collimated beam is converted to a diverging conical wave front by the first axicon, which is re-collimated by the second axicon having an oppositely signed cone angle. The output of the telescope is a collimated beam having an annular cross section, with the annulus having a width of dependent on the diameter of the telescope. The axiconic telescope may be used to produce an output beam having annulus size that can be optimized to illuminate a portion of a transducer in an solid immersion lens or photon tunning method device that contributes evanescent waves to increase resolution of an optical device.

REFERENCES:
patent: 5583342 (1996-12-01), Ichie

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