Folding transparency (microfiche) viewer

A transparency viewer comprising

• a housing including a light source, a film stage, a projection lens, and a screen, said housing including a lower housing and an upper housing,
• mirror means directing light to the film stage and then to the screen,
• a magnifying mirror in the lower housing,
• an aperture in the lower housing permitting the user to see the image on the screen as reflected by the magnifying mirror,
• said screen being moveably mounted in the upper housing to change the projection distance from the film stage and to change the distance of the screen from the magnifying mirror to thereby change the toe-in required of the user's eyes and adjust for the user's interocular,
• said screen mounting also having provision for pivotal movement between a viewing position in which the screen depends into the lower housing and a folded position in which the screen lies between the housings permitting the lower housing to be pivoted to a folded position relative to the upper housing.

A transparency viewer comprising,

• a housing including a film stage,
• a light source including a light bulb and a reflector directing the light towards the film stage,
• an aperture in the housing,
• a member slidably mounted in the housing adjacent the aperture for movement between a first position in which the member closes the aperture and a second position allowing entrance of ambient light to the interior of the housing,
• a mirror pivotally mounted in the housing for movement between a raised position and an operative position in which it lies in the light path from the light bulb and reflects ambient light entering said aperture toward the film stage,
• means for causing movement of the mirror from the raised position to the operative position when the sliding member moves from its first to its second position,
• a screen in the housing,
• a projection lens receiving the image from the film stage and focusing the image on the screen.

A transparency viewer comprising,

• a main housing,
• a light source in the housing,
• means directing light from the source to the rear of the housing,
• a film stage at the rear of the housing,
• a projection lens mounted in the housing,
• first and second mirrors in the housing, the first mirror reflecting light from the source to the film stage and the second mirror reflecting light from the film stage forwardly thru the projection lens,
• a viewing chamber housing connected to said main housing by pivot means, said viewing chamber housing being moveable from a first position below the main housing and a second position in which it fits over the main housing in a telescopic manner,
• a screen located in the viewing chamber when the viewing chamber housing is in said first position whereby the projected image is on the screen,
• a viewing opening in the front of the viewing chamber housing,
• a mirror in the rear of the viewing chamber housing whereby a user looking thru the viewing opening can see the image on the screen reflected in the mirror.