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Story
March 22, 1923
Watauga Democrat
Boone, Watauga County, North Carolina
What is this article about?
Description of a low-priced instrument designed to accurately measure the effective power of lenses, featuring a bracketed support with telescopic system, dioptric scale, illuminated target, and rotating dial, as detailed in Popular Mechanics Magazine.
Clipping
OCR Quality
95%
Excellent
Full Text
Shows Power of Lenses.
An instrument by the use of which the effective power of lenses may be ascertained, has been designed so that, although it will give accurate results, it is comparatively low-priced. The mechanism, described in Popular Mechanics Magazine, consists of an upright bracketed support carrying at one end a sliding telescopic lens system and a seat for the lens to be examined. Projecting from the other end of the bracket is a triangular bar marked with a dioptric scale, upon which is mounted a sliding carrier fitted with an illuminated target and a rotating axis dial. The target is mounted inside a rotating dial, which is graduated so that the axis of the lens being examined may be easily read.
An instrument by the use of which the effective power of lenses may be ascertained, has been designed so that, although it will give accurate results, it is comparatively low-priced. The mechanism, described in Popular Mechanics Magazine, consists of an upright bracketed support carrying at one end a sliding telescopic lens system and a seat for the lens to be examined. Projecting from the other end of the bracket is a triangular bar marked with a dioptric scale, upon which is mounted a sliding carrier fitted with an illuminated target and a rotating axis dial. The target is mounted inside a rotating dial, which is graduated so that the axis of the lens being examined may be easily read.
What sub-type of article is it?
Curiosity
What themes does it cover?
Triumph
What keywords are associated?
Lens Power
Instrument Design
Dioptric Scale
Popular Mechanics
Optics Testing
Story Details
Story Details
An affordable instrument for testing lens power includes a bracket with telescopic system, dioptric scale bar, sliding carrier with illuminated target, and rotating dial for reading axis.