Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A wavelength independent optical density standard for use in calibrating and checking an instrument which scans the standard with an illuminated zone along a predetermined scanning axis, the standard comprising: a. an optically transparent substrate; and, b. a light attenuating material imposed on said substrate to create a plurality of light attenuating strips in spaced relationship to form a band displaying a known optical density to light passing therethrough, said band having an area capable of totally eclipsing the illuminated zone, said light attenuating strips being disposed to produce a sweeping motion of the illuminated zone along a line normal to the scanning axis as the standard is scanned.
Claim 2
Dependent Claim
109 words
A wavelength independent optical density standard for use in calibrating and checking an instrument which scans the standard with an illuminated zone along a predetermined scanning axis, the standard comprising: a. an optically transparent substrate; and, b. a light attenuating material imposed on said substrate to create a plurality of light attenuating strips in spaced relationship to form a band displaying a known optical density to light passing therethrough, said band having an area capable of totally eclipsing the illuminated zone, said light attenuating strips being disposed to produce a sweeping motion of the illuminated zone along a line normal to the scanning axis as the standard is scanned.
Claim 3
Dependent Claim
34 words
The optical density standard of claim 1 wherein: said band is disposed to produce a sweeping motion of the illuminated zone along a line normal to the scanning axis as the standard is scanned.
Claim 4
Dependent Claim
136 words
A wavelength independent optical density standard for use in calibrating and checking an instrument which scans the standard with an illuminated zone along a predetermined scanning axis, the standard comprising: a. an optically transparent substrate; and, b. a plurality of bands disposed on sid substrate and spaced along the scanning axis, said bands each displaying a different predetermined optical density equivalent to light passing therethrough, said bands each comprising a plurality of light attenuating strips in spaced relationship, said bands each having an area capable of totally eclipsing the illuminated zone, said strips and said bands each being independently angled with respect to the scanning axis an amount sufficient to produce a sweeping motion across the illuminated zone by a portion of each of said strips and bands along a line normal to said scanning axis.
Claim 5
Dependent Claim
136 words
A wavelength independent optical density standard for use in calibrating and checking an instrument which scans the standard with an illuminated zone along a predetermined scanning axis, the standard comprising: a. an optically transparent substrate; and, b. a plurality of bands disposed on sid substrate and spaced along the scanning axis, said bands each displaying a different predetermined optical density equivalent to light passing therethrough, said bands each comprising a plurality of light attenuating strips in spaced relationship, said bands each having an area capable of totally eclipsing the illuminated zone, said strips and said bands each being independently angled with respect to the scanning axis an amount sufficient to produce a sweeping motion across the illuminated zone by a portion of each of said strips and bands along a line normal to said scanning axis.
Claim 6
Dependent Claim
21 words
The optical density standard of claim 3 wherein: said band and said strips assume independent acute angles to the scanning axis.
Claim 7
Dependent Claim
32 words
The optical density standard of claim 4 wherein: said angle of said band and said angle of said strips to the scanning axis is in the range of between 30° and 60°.