Optics: measuring and testing – By polarized light examination – With polariscopes
Patent
1978-11-13
1980-10-07
Corbin, John K.
Optics: measuring and testing
By polarized light examination
With polariscopes
356246, 356440, G01N 2103, G01N 2121, G01N 2123
Patent
active
042265347
ABSTRACT:
The micropolarizing equipment of the present invention consists in a pair of capillary tubes of black glass or glass with a black outer coating which fit into sockets in three prisms, the first being a 45.degree. prism over the central aperture of the microscope stage which reflects the plane polarized beam at right angles through one of the capillary tubes; a second prism, which is double, reflects light emerging from the first capillary tube at right angles up to a second 45.degree. prism into which the second capillary tube is mounted in a socket and is parallel to the first capillary tube. The third prism receives the other end of the second capillary tube in a socket and reflects the light up into the objective of the microscope. While split field, null point determination may be used, a much more efficient device is one or more small anisotropic crystals mounted, for example in a drop of liquid or in a thin film, on the top of the third prism and located to be in the path of the light reflected up into the objective of the microscope. The crystal, or one of the crystals, when viewed with polarizer and analyzer crossed is bright, usually in color depending on the wavelength of the light source used, and the particular crystal on which the microscope objective is focused disappears when the stage has been turned to compensate for the optical rotation of the sample in the two capillaries. The extinction of the crystal is very sharp and is preferred over split field devices.
REFERENCES:
patent: 3141094 (1964-07-01), Strickler
Hallmond, A. F., "Manual of the Polarizing Microscope", Cooke, Troughton & Simms, Ltd., 1953, pp. 72-79.
Corbin John K.
Fairfield University
Norton Robert Ames
Punter Wm. H.
LandOfFree
Micropolarimeter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Micropolarimeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Micropolarimeter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-616238