Abstract: In a base plate, projections for being inserted into openings in a lower bracket, and for supporting a bottom surface of a cross-dichroic prism, are provided. The lower bracket and the cross-dichroic prism are fixed to the base plate by adhesive agent filled into a clearance between the lower bracket and the bottom surface of the cross-dichroic prism supported on the projections. Holes are provided on a liquid-crystal panel, and holding arms provided on an upper bracket and the lower bracket are inserted into the holes. Then the adhesive agent is applied into the holes to fix the liquid-crystal display to the upper and lower brackets.

Abstract: In a base plate, projections for being inserted into openings in a lower bracket, and for supporting a bottom surface of a cross-dichroic prism, are provided. The lower bracket and the cross-dichroic prism are fixed to the base plate by adhesive agent filled into a clearance between the lower bracket and the bottom surface of the cross-dichroic prism supported on the projections. Holes are provided on a liquid-crystal panel, and holding arms provided on an upper bracket and the lower bracket are inserted into the holes. Then the adhesive agent is applied into the holes to fix the liquid-crystal display to the upper and lower brackets.

Abstract: A lens barrel for use in a zoom lens apparatus to address the needs of optical devices such as a liquid crystal projector equipped with higher magnification and higher accuracy is provided. That is, the lens barrel of the present invention includes: supporting projections provided on the outer periphery of a fixed barrel projecting therefrom to support a cam barrel in contact therewith in a small area for ensuring smooth rotation of the cam barrel; and alignment guides formed in the fixed barrel and the cam barrel to fit the cam barrel into the fixed barrel keeping a predetermined positional relationship therebetween, thereby enabling the operation for adjusting the position of transmission of light having passed through a liquid crystal panel within a projection lens to be performed without any trouble.

Abstract: A lens barrel for use in a zoom lens apparatus to address the needs of optical devices such as a liquid crystal projector equipped with higher magnification and higher accuracy is provided. That is, the lens barrel of the present invention includes: supporting projections provided on the outer periphery of a fixed barrel projecting therefrom to support a cam barrel in contact therewith in a small area for ensuring smooth rotation of the cam barrel; and alignment guides formed in the fixed barrel and the cam barrel to fit the cam barrel into the fixed barrel keeping a predetermined positional relationship therebetween, thereby enabling the operation for adjusting the position of transmission of light having passed through a liquid crystal panel within a projection lens to be performed without any trouble.

Abstract: In a lens barrel of a fixed-focus type, a guide section of a back moving frame for holding a lens back group is disposed at the middle between two guide sections provided on a front moving frame for holding a lens front group. A guide shaft is inserted into guide holes of those guide sections. A compression spring is disposed between one of the two guide sections provided on the front moving frame and the guide section of the back moving frame. A front moving frame and a back moving frame are moved together in an optical axis. At the time of a collapse, the compression spring is further compressed.