Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1996-02-23
1997-10-14
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250234, 356121, 356124, G02B 2740
Patent
active
056775253
ABSTRACT:
The invention relates to an ancillary module 7 for making spatially resolved measurements of the focus volume of a light beam focussed by a microscope objective 4. The light beam is especially a laser beam. The invention includes a carrier assembly having a glass plate 8 and sleeves (9, 10) mounted thereon. A piezoelectric scanning tube 12 is held on the sleeves (9, 10) essentially perpendicularly to the glass plate 8. The scanning tube 12 operates to move an optical near-field probe 13a in three mutually perpendicular directions. The optical near-field sensor is preferably a glass fiber 13 which has a tip 13a at one end thereof. This tip 13a scans the laser focus volume. At the other end of the glass fiber 13, either a photodiode 14 is provided with which the light coupled into the glass fiber is detected or a corresponding light detector can be adapted by means of an interface. The two sleeves (9, 10) are displaceable relative to each other for coarsely positioning the scanning tube 12. In addition, position detectors (18a, 18b) for determining the deflection of the piezoelectric scanning tube 12 and luminescent diodes (17a, 17b) for illuminating the fiber tip 13a can be provided. The fiber tip 13a can be illuminated by the luminescent diodes and this tip can be observed for positioning the ancillary module 7 in the viewing field of the microscope 1.
REFERENCES:
patent: 4160598 (1979-07-01), Fivester et al.
patent: 4965441 (1990-10-01), Picard
patent: 5138486 (1992-08-01), Meyer et al.
"Confocal scanning light microscopy with high aperture immersion lenses" by G. J. Brakenhoff et al, Journal of Microscopy, vol. 117, Nov. 1979, pp. 219 to 232.
Gluch Martin
Grub Robert
Volcker Martin
Wormann Wolfgang
Carl-Zeiss-Stiftung
Giles Alan L.
Ottesen Walter
Westin Edward P.
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