| 摘要 |
An integral type lens for use with a projection TV is composed of a first lens having a rim in the outer circumference thereof and a second lens disposed within the rim of this first lens. The integral type lens comprises a plurality of slanting faces inclined with respect to a tangential line at an equal distance from a lens center on either one of an inside face of the rim of the first lens and an outside face of the second lens, and contact pieces contacting the plurality of slanting faces on the other of the inside face of the rim of the first lens and the outside face of the second lens. The slanting faces and the contact pieces are engaged with each other to conform the optical axes of the first and second lenses to each other.
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