Abstract: A micro-structure template for fabricating ordered arrays of particles includes a top surface and a bottom surface, with the top surface having a plurality of closely-spaced depressions. Particles are disposed in the closely-spaced depressions to form at least one layer of particles.

Abstract: An optical system for an ocular optical system or a projection optical system, in which a plurality of illuminating light sources of different colors can be placed in a side-by-side relation to each other, and which makes it possible to reduce the overall size and weight of an apparatus such as a head-mounted image display apparatus or a color film projection apparatus. The optical system has an image-forming optical system (1) that projects a real image or virtual image of an object placed in an image plane (3). The image-forming optical system (1) has an entrance pupil (5) at a position on the side of the image plane (3) remote from the image-forming optical system. An exit pupil (4) is located in a conjugate relation to the entrance pupil (5) with respect to the image-forming optical system (1). A chromatic aberration producing device (6) is provided between the entrance pupil (5) and the exit pupil (4).

Abstract: An optical component housing is provided which is easy to form and in which dimensional accuracy of an optical component positioning portion is easily ensured. The optical component housing for housing an optical component constituting an optical system is made of metal and has an optical component positioning portion for positioning an optical component. The optical component positioning portion is formed by thixomolding using a metal material, and includes first support portions for supporting the light incident surface or the light emitting surface of the optical component. A portion of a side plate in contact with the first support portions is provided with portions previously removed that are formed by inserting inserts in a mold.