Roof reflective polygon scanning apparatus

A continuous projector system for projecting images from a medium such as a film strip with a plurality of sequentially framed images comprising;

• a source of light energy;
• means for mounting the sequentially framed medium for continuous movement;
• a condenser lens assembly for refracting the source of light energy to continually illuminate at least two full frames of the film strip,
• a first scanner member having a plurality of reflective surfaces;
• a second scanner member having a plurality of reflective surfaces;
• mounting means for permitting a rotational movement of the first and second members about a common axis relative to the source of energy;
• and
• projection lens means having a focal surface substantially coincident with the common axis of rotation, including at least a doublet and a negative biconcave lens, the first member reflective surfaces and second member reflective surfaces mounted to reflect a transmitted light ray from the film medium so it can sweep a predetermined distance across the reflecting surfaces and the projection lens means can project real images, the light ray being reflected between at least a reflective surface on each scanner member, wherein d.sub.1 is the distance along the optical axis between the reflective surfaces, d.sub.2 is the radial distance from the common axis of rotation to a plane containing the reflected light ray between the two reflective surfaces and d.sub.3 is the radial distance from the common axis of rotation to the image surface, the respective distances being related for an air equivalent optical path as follows:
• d.sub.3 = 2d.sub.2 - d.sub.1

A projector system for projecting images from a medium such as a film strip comprising:

• means for mounting a sequential framed medium to enable a source of energy such as light to illuminate two full frames of the medium;
• a first member having a plurality of 60.degree. reflective surfaces;
• a second member having a plurality of roof reflective surfaces to provide a linear translation of the optical axis perpendicular to each frame;
• mounting means for permitting a rotational movement of the first and second members about a common axis relative to the source of energy;
• and
• lens means having a focal surface substantially coincident with the common axis of rotation, the first member reflective surfaces and second member roof reflective surfaces mounted to reflect a transmitted energy beam from the medium so an energy beam can sweep a predetermined distance across the reflecting surfaces and the lens means can project images.