Patent ID: 7961401

Claim:
An optical system for imaging target objects, comprising: a rail upon which a focus lens cell and a zoom lens cell are moveably mounted; said focus lens cell comprising at least one focus lens and a primary aperture that limits the amount of light incident on said focus lens, wherein said focus lens cell has a first focus position on said rail and a second focus position on said rail, and wherein said first focus position has a different depth of field than said second focus position; said zoom lens cell comprising at least one zoom lens, wherein said zoom lens cell has a first zoom position on said rail and a second zoom position on said rail, wherein said first zoom position has a different magnification than said second zoom position; a secondary aperture proximate said focus lens cell, wherein said secondary aperture is moveable in front of said focus lens cell, wherein said secondary aperture has a first aperture position and a second aperture position, and wherein said first aperture position allows a different amount of light to be incident on said focus lens than said second aperture position; and a lens movement mechanism that causes movement of said focus lens cell axially along said rail; wherein said lens movement mechanism moves said focus lens cell from said second focus position to said first focus position axially along said rail causing movement of said secondary aperture from said second aperture position to said first aperture position and movement of said zoom lens cell from said second zoom position to said first zoom position axially along said rail to change said depth of field, said magnification, and said amount of light incident on said focus lens.