blue filter gel samples
Date1970-1985
Inventory Number2004-1-0269
ClassificationFilters
Subject
Maker
Edwin H. Land
1909 - 1991
User
Scientific American
founded 1845
Cultural Region
Place of Origin
Dimensions21.5 × 13 × 0.2 cm (8 7/16 × 5 1/8 × 1/16 in.)
Material
DescriptionFour transparencies, each with a blue plastic or gelatin strips mounted in black cardboard. Each has an identical graph with the y-axis for the percent of transmittance and the x-axis for the wavelength, in white line drawing. All stored in a white enveloppe.
In Collection(s)
Signedunsigned
Curatorial RemarksThe enveloppe mentions that these were used in Edwin Land's 1977 <i>Scientific American</i> article. There are no evidence this information is accurate.
FunctionUsed and designed for Edwin Land's Retinex color vision theory. Might have been used for articles or lectures.
ProvenanceThis object belonged to Edwin H. Land and came from the Rowland Institute, Harvard University. Gift of the Edwin H. Land Family.
Edwin H. Land
Date: 1970-1985
Object number: 2004-1-0257
Edwin H. Land
Date: 1955-1980
Object number: 2004-1-0264a
Edwin H. Land
Date: circa 1957
Object number: 2004-1-0256
