1977-08-22
1979-01-16
Griffin, Donald A.
350178, G03B 1708, B29D 1100
Patent
active
041346513
ABSTRACT:
A method of making an assembly comprising a support plate with an array of lenslets made from optically refractive material mounted thereon, the support plate being substantially optically transparent at least in the regions adjacent the lenses, the method including, in respect of each lenslet, the steps: positioning the lenslet on the plate with a quantity of adhesive therebetween, the adhesive being curable by electromagnetic radiation in a given wavelength range; and, after checking that the lenslet is in a required position relative to the support plate, applying electromagnetic radiation within said wavelength range to the adhesive through the lens and/or the plate to cure the adhesive and fix the lenslet to the plate. The checking step includes observing an image, formed by an optical system including the lenslet, of a reference mark and adjusting the position of the lenslet on the support plate until the observed image is exactly in a predetermined position in an image plane. An assembly made by the method and a photocomposing machine incorporating such an assembly.
REFERENCES:
patent: 2382660 (1945-08-01), Penberthy
patent: 2652755 (1953-09-01), Higonnet et al.
patent: 2905068 (1959-09-01), Friedman
patent: 2917980 (1959-12-01), Grube et al.
patent: 2919626 (1960-01-01), Bergmann
patent: 3618487 (1971-11-01), Tiefenthal et al.
patent: 3687557 (1972-08-01), Odhner
Griffin Donald A.
The Monotype Corporation Limited
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