Variable Scale Rangefinder for Distant Object Size Measurement
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Solution Overview
Problem
Existing optical sighting devices, such as rangefinders and riflescopes, require users to perform complex calculations and estimations to measure the size of distant objects, which can lead to inaccurate results and necessitate specialized training or additional equipment, while also obstructing the view with external keypads and displays.
Innovation Solution
A handheld laser rangefinder with a visual display that includes a variable scale and indicia, which adjusts based on measured range, allowing users to align the scale with the object for accurate size measurement without diverting attention from the target, using a system that includes a laser ranging system, optical sighting device, and a user interface for selecting gauges and units of measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If users perform complex calculations and estimations to measure the size of distant objects, then measurement capability is achieved, but measurement precision deteriorates due to human error and specialized training requirements
Solution Approach 1:
The device automatically performs size measurements by capturing an image of the distant object, detecting its dimensions, and calculating the actual size using the known range. The system serves itself by eliminating the need for manual calculations, estimations, or specialized training, thereby improving measurement precision while maintaining ease of operation
Solution Approach 2:
The patent replaces manual mechanical measurement methods (using reticles, estimation techniques, and calculation procedures) with an automated optical and computational system. The image capture device, processor, and automatic calculation algorithms substitute for human operators performing complex estimations, thereby improving both precision and ease of use
2Adaptability or versatility
If external keypads and displays are added to the device, then measurement functionality is enhanced, but the view of the target is obstructed
Solution Approach 1:
The patent merges the display and control functions into the existing optical sight structure. The visual display is integrated into the sight's field of view area, and the keypad functions are incorporated into the device housing without protruding elements that would obstruct the target view. This combining approach enhances measurement functionality while preserving the unobstructed field of view
Solution Approach 2:
The patent positions the visual display in a location that does not block the forward view of the target - potentially on the side or rear of the device housing, or using a transparent display technology that allows light transmission. This spatial repositioning in another dimension enables full measurement functionality without compromising the optical path to the target
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables users to accurately measure the size of distant objects with improved ease and precision, reducing the need for complex calculations and specialized training, while maintaining an unobstructed view of the target through the use of an integrated and adjustable visual display.
Implementation Method 1
handheld laser rangefinder
Implementation Method 2
laser ranging system that has been aimed at the object
Data Source
AI summary
Measuring the size of a distant object using a gauge sized according to a range to the object is provided. A user may select an initial target scale size and use an aiming mark to align a rangefinder with the object before determining the range. Indicia may be associated with the gauge, both of which could be displayed in a field of view of an optical sighting device, such as a rangefinder, riflescope, or spotting scope. In addition, the gauge or the indicia, or both may be alterable in response to the determined range. While looking through an eyepiece of the optical sighting device, the user may align the gauge with the object and estimate its size by visually comparing the gauge and object with reference to the indicia. The gauge may be geometrically shaped and may contain a series of spaced apart measuring marks having a logarithmic spacing.