| 摘要 |
This invention relates to a range-indicating, variable-power telescopic sight; based on the principle of comparing adjustable spaced reference elements, with known target dimensions, reading said comparison on a scale of distance. More specifically, non-magnifying reference elements positioned within the optical system in a variable-power telescope at the rearward focal plane are superimposed upon the image of the target object and the size of the target object is altered by manually varying the degree of magnification of said target object until such target object is bracketed just between the spaced reference elements. A scale of target object distance, also within the optical system, positioned at the rearward focal plane, operativly connected to the means of varying the degree of magnification of the target object and correlated with the various degrees of magnification shows the distance to the target object once the foregoing condition is achieved.
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