US 4,056,318 AGranted

Optical system for use in microfilm reading and printing apparatus

AssigneeMinolta Camera Kabushiki Kaisha

InventorYutaka Watanabe

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Abstract

An optical system for use in a microfilm reading and printing apparatus which includes two reflecting mirrors for selective projection of light image from a microfilm onto an observation screen and a printing section within the apparatus. The two reflecting mirrors are driven in such a manner that they direct the image light from the microfilm onto the observation screen during reading, while the first reflecting mirror directs the image light from the microfilm toward the printing section during duplication, with the second reflecting mirror being turned away from the light path between the first mirror and the printing section, thus amount of rotation of the reflecting mirrors, especially of the first reflecting mirror being minimized for effective utilization of the limited space within the apparatus housing.

Claims6

Dependent claims

An optical system for use in a microfilm reading and printing apparatus which comprises a lens assembly for selectively projecting, on an enlarged scale, image light of information on a microfilm illuminated by a light source onto an exposure station of a printing section and onto an observation screen of the microfilm reading and printing apparatus, a first reflecting mirror, a second reflecting mirror, said first reflecting mirror being displaceable between a first position thereof for projecting said image light through said lens assembly onto said exposure station and a second position thereof for projecting said image light onto said second reflecting mirror, said second reflecting mirror being displaceable between a first position thereof for projecting said image light from said first mirror at said second position onto said observation screen and a second position thereof spaced away from a path of said image light between said first reflecting mirror at said first position and said exposure station, said first and second reflecting mirrors being disposed for intercepting outside light entering from said observation screen when the former is at said first position and the latter is at said second position, and driving means for positioning said first reflecting mirror to said second position and said second reflecting mirror to said first position during reading, and also for positioning said first reflecting mirror to said first position and said second reflecting mirror to said second position during printing.

An optical system for use in a microfilm reading and printing apparatus which comprises a lens assembly for selectively projecting, on an enlarged scale, image light of information on a microfilm illuminated by a light source onto an exposure station of a printing section and onto an observation screen of the microfilm reading and printing apparatus, a first reflecting member, a second reflecting member, said first reflecting member being displaceable between a first position thereof for projecting said image light through the lens assembly onto said exposure station and a second position thereof for projecting said image light on said second reflecting member, said first reflecting member normally being disposed at said first position by its weight, said second reflecting member being displaceable between a first position thereof for projecting said image light from said first reflecting member at said second position onto said observation screen and a second position thereof spaced away from a path of said image light between said first reflecting member at said first position and said exposure station, and driving means for driving said first and second reflecting member and including first and second lever members provided on said first and second reflecting members respectively, an associating member engaged with said first and second lever members, an urging member connected with said second lever member and urging said second reflecting member to said first position and urging said first lever member through said associating member to maintain said first reflecting member at said second position during reading, a driving source for driving said second lever member against said urging member to bring said second reflecting member to said second position with said associating member following the movement of said second lever member to move said first lever member by the weight of said first reflecting member to bring said first reflecting member to said first position, whereby said first and second reflecting members are positioned suitable for printing.

Dependencies are inferred from the claim text.