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US 2002/0159050 A1Published application
Hand-held automatic refractometer
AssigneeLeica Microsystems Inc.
InventorsKeshav D. Sharma, Kyle R. Bleyle
Life of this patent
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AssigneeLeica Microsystems Inc.
InventorsKeshav D. Sharma, Kyle R. Bleyle
Estimating the term…
A hand-held automatic refractometer comprises a linear scanned array having a plurality of photoelectric cells and an optical system for directing light onto the array, the particular photoelectric cells of the array which are illuminated by said light being determined by the index of refraction of a sample substance placed on a sample surface of a prism of the optical system. A reflective surface is arranged close to the array at an acute angle thereto for directing primary light from the sample-prism boundary to the array, and for redirecting stray reflected light from the array back onto the array. The disclosed refractometer has a compact design wherein the linear array extends in a direction substantially parallel to the prism sample surface. The prism is mounted in a housing and the sample surface faces upward to allow access through a sample well of the housing, while the array is mounted in the housing facing in a downward direction.
A refractometer comprising:
In an automatic refractometer having an array of photoelectric cells and optical means for directing light onto said array, the particular photoelectric cells of said array which are illuminated by said light being determined by the index of refraction of a sample substance placed in operative association with said optical means, the improvement comprising:
In an automatic refractometer having a linear scanned array of photoelectric cells and optical means for directing light onto said array, the particular photoelectric cells of said array which are illuminated by said light being determined by the index of refraction of a sample substance placed in operative association with a sample-receiving surface of said optical means, the improvement comprising:
A refractometer comprising:
A refractometer comprising:
In a refractometer having a prism including a sample surface for receiving a test sample to provide a critical angle boundary between said test sample, a light entry surface through which light travels to reach said critical angle boundary, and a light exit surface through which light travels after interaction at said critical angle boundary, the improvement comprising:
Dependencies are inferred from the claim text.