Abstract: A circular arc slide apparatus that achieves improved precision and a reduction in costs is provided. The circular arc slide apparatus comprises a lower plate, an upper plate, and a circular arc track provided between the lower plate and upper plate. Guide rail portions are provided in an upper surface of the lower plate and a lower surface of the upper plate, and circular arc curve-shaped guide grooves that constitute the circular arc track are provided in opposing planar surfaces of the guide rail portions. The guide groove cross-section describes a circular arc-shape, and a plurality of balls are rollably fitted between the opposing guide grooves in a preloading state. The lower plate and upper plate are integrally machined from a plate-like material and formed in a shape comprising the guide rail portions and guide grooves, and the inner surface of each guide groove is configured as a machined face produced by an end mill.

Abstract: A circular arc slide apparatus that achieves improved precision and a reduction in costs is provided. The circular arc slide apparatus comprises a lower plate, an upper plate, and a circular arc track provided between the lower plate and upper plate. Guide rail portions are provided in an upper surface of the lower plate and a lower surface of the upper plate, and circular arc curve-shaped guide grooves that constitute the circular arc track are provided in opposing planar surfaces of the guide rail portions. The guide groove cross-section describes a circular arc-shape, and a plurality of balls are rollably fitted between the opposing guide grooves in a preloading state. The lower plate and upper plate are integrally machined from a plate-like material and formed in a shape comprising the guide rail portions and guide grooves, and the inner surface of each guide groove is configured as a machined face produced by an end mill.

Abstract: It is an object to provide an optical component holding unit whereby the positioning accuracy can be improved while reducing cost through facilitated assembling and ensuring reproducibility. The fitting between a cross-sectionally noncircular-shaped rectangular convex portion 8a and a rectangular hole and the fitting between a cross-sectionally circular-shaped circular convex portion 11a and a circular hole, which surround or form opening portions 22a and 22b for allowing passage of light, guide adjacent optical component holding units 35 to predetermined positions and couples the units detachably to each other for positioning in the three-dimensional direction, while the fitting between the rectangular convex portion 8a and the rectangular hole and the fitting between spring pins 13a and fitting holes restrain the adjacent optical component holding units 35 relatively in the rotation direction for positioning in the rotation direction.

Abstract: It is an object to provide an optical component holding unit whereby the positioning accuracy can be improved while reducing cost through facilitated assembling and ensuring reproducibility. The fitting between a cross-sectionally noncircular-shaped rectangular convex portion 8a and a rectangular hole and the fitting between a cross-sectionally circular-shaped circular convex portion 11a and a circular hole, which surround or form opening portions 22a and 22b for allowing passage of light, guide adjacent optical component holding units 35 to predetermined positions and couples the units detachably to each other for positioning in the three-dimensional direction, while the fitting between the rectangular convex portion 8a and the rectangular hole and the fitting between spring pins 13a and fitting holes restrain the adjacent optical component holding units 35 relatively in the rotation direction for positioning in the rotation direction.