GB2245988A - Telescopic sight of solid transparent material - Google Patents
Telescopic sight of solid transparent material Download PDFInfo
- Publication number
- GB2245988A GB2245988A GB9111613A GB9111613A GB2245988A GB 2245988 A GB2245988 A GB 2245988A GB 9111613 A GB9111613 A GB 9111613A GB 9111613 A GB9111613 A GB 9111613A GB 2245988 A GB2245988 A GB 2245988A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- sight
- graticule
- doublet
- focal length
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/14—Viewfinders
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Lenses (AREA)
Abstract
A solid glass (or other transparent material) telescopic sight having a double prism image erecting system, comprises an objective lens 1 adapted to face a target, a graticule 5 disposed substantially at the focal length of the objective lens, a pair of orthogonally arranged prisms 6, 7 to erect the image, and an ocular lens 2 adapted to face an eye of the user. A third lens 4 disposed at the focal length and comprising a doublet lens having the graticule (5) between the components of a doublet lens or adjacent thereto, may be provided. <IMAGE>
Description
TELESCOPIC SIGHT
The present invention relates to a telescopic sight. More particularly, it relates to a telescopic sight having a double prism image erecting system, and being cemented together into a solid transparent optical system.
It is known to provide sights having an image erecting system, hut such sights contain voids. It is necessary to purye such voids and fill then with dry nitroyen in order to maintain the usefulness of the sight.
It is an object of the present invention to provide a sight which is a solid unitary whole whereby such disadvantages may be overcome.
According to the present invention there is provided a telescopic sight comprising an objective lens adapted to face a target, a graticule disposed substantially at the focal length of the objective lens, a pair of othogonally arranyed prisms to erect the image, and an ocular lens adapted to face an eye of the user.
A third lens may be provided substantially at the focal length, said third lens comprising a doublet lens having the graticule between the components of a doublet lens or adjacent thereto.
Preferably, the graticule has an opaque pattern.
An embodiment of the present invention will now be more particularly described by way of' eample and with reference to the accompanying drawings, in which:
Figure 1 is a side elevation of the sight;
Figure 2 is a plan view of the siyht; and
Figure 3 is an elevation of the taryet end of the sight.
Referring now to the drawings, there is shown a telescopic siyht which comprises a plurality of transparent units cemented together to form a unitary whole.
In the embodiment shown, an objective lens 1 and an ocular lens 2 each comprise a triplet arranyement of similar design it is possible that these lenses I and 2 need not: be triplets, but may be doublets or any other suitable converging lens arrangement Light rays passing from the target, through the objective lens 1, then pass through a solid block of transparent material 3 to a field lens/graticule arrangement 4, disposed at the focal length of the objective lens 1. In the embodiment shown, the field lens is a doublet arrangement with a graticule plate attached thereto at its front face.
The provision of the doublet field lens is not necessarily essential, and the graticule plate 5 may, if so desired, be located between the two lenses of the doublet arrangement, or on the eyeward facing side of the lens.
The graticule bears an opaque graticule pattern so that, as seen by the eye of the user, the graticule shows black against the target scene. Since it is disposed at the focal point of the lens, there is negligible parallax against the target scene.
The image is then erected by the light ray passing firstly through a first prism 6, reversing in a horizontal plane and then through a second prism 7, reversing in a errical lane. The light then passes to the ocular lens 2 and then co tulle eye of the user 8.
It is preferred that the overalllength of the sight is 91. mn in which case the ideal position for the eve of the user 8 is 64.4 mm from the ocular lens 2. The oral! cross sectional dimensions are preferably 25 mm acruss and 2 5 mm high.
Such a lens has a field of vie of 8" and an exit pupi diameter of 10 mm. Since the magnification is very close to unity, the views through and around the sight should match in the eye of the user.
The sight as described above may be mounted in a housing which can incorporate a means for zeroing.
Claims (4)
1. A telescopic sight comprising a transparent objective lens adapted to face a target, a yraticule disposed substantially at the focal length of the objective lens, a pair of orthogonally arranged transparent prisms to erect the image, a transparent ocular lens adapted to face an eye of the user, and transparent means fixedly connectiny said lenses and prisms whereby the sight forms a unitary solid body.
2. A sight as claimed in claim 1, wherein a third lens is provided substantially at said focal length, said third lens comprising a doublet lens having the graticule between the components of said doublet lens.
3. A sight as claimed in claim 1, wherein a third lens is provided substantially at said focal length, said third lens conrising a doublet lens having the graticule adjacent to said doublet lens.
4. A sight as claimed in any one of the preceding claims, wherein the graticule has an opaque pattern.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB909011978A GB9011978D0 (en) | 1990-05-30 | 1990-05-30 | Telescopic sight |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9111613D0 GB9111613D0 (en) | 1991-07-24 |
GB2245988A true GB2245988A (en) | 1992-01-15 |
Family
ID=10676726
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB909011978A Pending GB9011978D0 (en) | 1990-05-30 | 1990-05-30 | Telescopic sight |
GB9111613A Withdrawn GB2245988A (en) | 1990-05-30 | 1991-05-30 | Telescopic sight of solid transparent material |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB909011978A Pending GB9011978D0 (en) | 1990-05-30 | 1990-05-30 | Telescopic sight |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB9011978D0 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009136858A1 (en) * | 2008-05-09 | 2009-11-12 | Gs Development Ab | Combination sight |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB810899A (en) * | 1956-03-22 | 1959-03-25 | Leitz Ernst Gmbh | Improvements in or relating to telescopes |
GB1164064A (en) * | 1966-11-10 | 1969-09-10 | Leitz Ernst Gmbh | Improvements in or relating to Telescopic Sights |
US4390276A (en) * | 1980-05-14 | 1983-06-28 | Ring Sights Limited | Collimator gunsight |
-
1990
- 1990-05-30 GB GB909011978A patent/GB9011978D0/en active Pending
-
1991
- 1991-05-30 GB GB9111613A patent/GB2245988A/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB810899A (en) * | 1956-03-22 | 1959-03-25 | Leitz Ernst Gmbh | Improvements in or relating to telescopes |
GB1164064A (en) * | 1966-11-10 | 1969-09-10 | Leitz Ernst Gmbh | Improvements in or relating to Telescopic Sights |
US4390276A (en) * | 1980-05-14 | 1983-06-28 | Ring Sights Limited | Collimator gunsight |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009136858A1 (en) * | 2008-05-09 | 2009-11-12 | Gs Development Ab | Combination sight |
US9303952B2 (en) | 2008-05-09 | 2016-04-05 | Gs Development Ab | Combination sight |
Also Published As
Publication number | Publication date |
---|---|
GB9111613D0 (en) | 1991-07-24 |
GB9011978D0 (en) | 1990-07-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |