Patent
1984-12-06
1986-12-23
Corbin, John K.
350174, G02B 2302
Patent
active
046309004
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a system for introducing by reflection additional information into the optical path of a telescope or binoculars.
Such a system for introducing by reflection additional information in the optical path of binoculars is known from GB-PS No. 406336. This known system includes a set of prisms deflecting the image-forming rays associated with the additional information and introducing said rays by reflection in the optical path of the binoculars. Furthermore, this known system includes a lighting arrangement for the information carrier.
Furthermore, binoculars with a compass attached to the top side of said binoculars are known from German utility Pat. No. 7907058, said compass containing a rotating graduated dial instead of the commonly used compass needle, whereby said graduated dial consists of transparent or translucent material at least within the outer zone of the dial. The image of said graduated dial is incorporated in the optical path of the binoculars with the help of a special optical system. In this way, the user of the binoculars is simultaneously provided with information on the direction in which he is viewing. In many cases, however, it is desired to additionally incorporate specifically associated map sectors with correct positioning.
Therefore, the primary object of the invention is to provide a device for introducing by reflection correctly oriented map sectors into the optical path of a telescope or binoculars.
This object is accomplished according to the present invention by the provision of a system for incorporating information regarding direction in the optical path of a telescope or binoculars, wherein the information is contained on a slide or film strip outside the optical path of the telescope or binoculars, the slide or film strip containing a map sector with angle information, comprising means for illuminating the slide or film strip from behind, an arm containing optical elements for adapting the path of the image rays of the information to the optical path of the telescope, the arm being movable between a first position in which an image of the slide or film strip is superimposed on the optical path of the telescope and a second position in which said image is removed from said optical path, and means for rotating said image. Image rotation may be accomplished by rotating the slide or film strip itself using a thumb wheel of by rotating a prism forming part of the optical elements contained in the arm using another thumb wheel.
Other objects and features of the present invention will become apparent from the following detailed description considered in connection with the accompanying drawing. It is to be understood, however, that the drawing is designed as an illustration only and not as a definition of the limits of the invention.
In the drawing wherein similar reference characters denote similar elements throughout the several views:
FIG. 1 is a perspective view of an auxiliary device mounted on a telescope having a pivotable arm which may be pivoted into the optical path of the telescope; and
FIG. 2 is a diagrammatic view showing details of the optical system employed in the auxiliary device shown in FIG. 1.
In certain situations such as, for example, when sailing or flying, it is very difficult or almost impossible to use maps in the normal manner. In such cases, a telescope or binoculars, as shown in the drawing, including a sector of the map contained on a slide or film strip 10 is helpful, said slide or film being illuminated from the back side by means of a lighting system 11. In addition, the slide or film strip 10 with the map sector also contains angle information from which it is possible to take a reading of the associated points of the compass. As described in greater detail below, a prism assembly 17 can be rotated by means of a thumb wheel 32, permitting the viewer to orient the map sector to the direction of viewing, if need be also via a compass introduced by reflection. Alternatively, slide 10 can be rotated by means of a thumb wheel 1
REFERENCES:
patent: 2937559 (1960-05-01), Shute et al.
patent: 3002418 (1961-10-01), Mitchell
patent: 3049972 (1962-08-01), Malinowski
patent: 3865468 (1975-02-01), Holcomb
Optical Engineering, Nov./Dec., 1974, Pechan Derotation Prism-Application and Alignment Notes, by B. H. Walker, vol. 13-No. 6, G233-4.
Corbin John K.
Lemmo V. J.
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