GB821378A - Phase contrast microscope - Google Patents
Phase contrast microscopeInfo
- Publication number
- GB821378A GB821378A GB17185/57A GB1718557A GB821378A GB 821378 A GB821378 A GB 821378A GB 17185/57 A GB17185/57 A GB 17185/57A GB 1718557 A GB1718557 A GB 1718557A GB 821378 A GB821378 A GB 821378A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phase contrast
- condenser
- interference filter
- filter
- objective
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
- G02B21/08—Condensers
- G02B21/14—Condensers affording illumination for phase-contrast observation
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microscoopes, Condenser (AREA)
Abstract
821,378. Phase contrast microscopes. LOCQUIN, M. May 30, 1957 [June 22, 1956], No. 17185/57. Class 97(1) A phase contrast microscope having a condenser lens adapted to illuminate the object with a hollow conical beam from a conventional source, and a wide angle objective lens, is provided with an interference filter extending over the whole aperture of the objective which has a numerical aperture substantially equal to that of the condenser. As shown, light from a source 1 is reflected by a mirror 3 through a variable annular diaphragm 4 and converges on to the object 6 by means of the condenser 5; the rays then pass through the interference filter 7 to the microscope objective 8 to form a contrasted image 10 of the object. The variable aperture 4 may be in the form of a disc rotatable about a vertical axis having several annular apertures which may be brought successively into the optical system. The filter 7 is in the form of a slab of transparent material such as cryolite with semi-transparent coatings on both faces. A first or higher order filter may be used, and a second interference filter may be associated with the light source. The Specification contains a theoretical discussion of the properties of such a system.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR821378X | 1956-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB821378A true GB821378A (en) | 1959-10-07 |
Family
ID=9276706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17185/57A Expired GB821378A (en) | 1956-06-22 | 1957-05-30 | Phase contrast microscope |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB821378A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2128678A1 (en) * | 2007-03-19 | 2009-12-02 | Nikon Corporation | Observation device and wavelength limiting filter |
-
1957
- 1957-05-30 GB GB17185/57A patent/GB821378A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2128678A1 (en) * | 2007-03-19 | 2009-12-02 | Nikon Corporation | Observation device and wavelength limiting filter |
| EP2128678A4 (en) * | 2007-03-19 | 2010-06-23 | Nikon Corp | Observation device and wavelength limiting filter |
| US8159675B2 (en) | 2007-03-19 | 2012-04-17 | Nikon Corporation | Observation device and wavelength limiting filter |
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