Abstract: A micro light emitting device includes an epitaxial structure, a conductive layer, and a first insulating layer. The epitaxial structure has a first surface and a second surface opposite to the first surface, and includes a first semiconductor layer, an active layer and a second semiconductor layer that are arranged in such order in a direction from the first surface to the second surface. The conductive layer is formed on a surface of the first semiconductor layer away from the active layer. The first insulating layer is formed on the surface of the first semiconductor layer away from the active layer, and exposes at least a part of the conductive layer.

Abstract: A liquid-cooled cooling structure includes a cooling main body having a condensation chamber and an evaporation chamber arranged vertically therein; a separation member arranged between and separating the condensation chamber and the evaporation chamber, and having a first through hole and a second through hole communicating with the condensation chamber and the evaporation chamber, a dimension of the first through hole being greater than that of the second through hole; a longitudinal partition board received in the condensation chamber and arranged between the first through hole and the second through hole and separating the condensation chamber into a first channel and a second channel; cooling fins extended from an outer perimeter of the cooling main body.

Abstract: A lateral shear interferometer including a pair of cubic prisms having a diagonal semi-reflective plane as the lateral shear producing element is used to test optical components having aspheric surfaces. An effective aperture is defined by the cubic prisms such that rays propagating therewithin will leave the cubic prisms with a first beam and a second beam propagating divergently with respect to each other. An aperture stop is used to allow only one of the beams to pass therethrough while reject the other. The fringe density of the interference pattern is therefore reduced to be more suitable for analysis. The lateral shear interferometer also provides stable interference patterns as long as a deviation of the light beam incident upon the cubic prisms does not exceeds the limits defined by the effective aperture of the cubic prisms.