Abstract: A cartridge type attachment lens is arranged in front of a digital camera for receiving card lenses. A cuboid shaped shell is removably attached to a camera lens. A battery and a lighting unit as a light source for the close-up photography are in the shell. A plurality of parallel slots are each disposed on one lateral side of the shell, and each slot extends inwards to form a sliding groove in the shell for accommodating the card lens. Multiple card lenses can be inserted the shell to form arbitrary permutation and combination.

Abstract: A dark field lighting testing device, for detecting a surface defect of an object having mirror surfaces, includes a cavity, the interior surface of which is made of a light-absorbing material; an opening arranged on a top of the cavity; a tape body arranged on the interior surface of the cavity; a plurality of lighting elements arranged on the tape body and electrically connected to each other; and a plate body arranged right above the opening of the cavity. During testing procedure, light emitted from each lighting element is incident upon the surface of the tested object, from which the diffusively reflected or refracted light forms an image on the surface of the plate body, thus a defect on the surface of the tested body and a position thereof being able to be detected.

Abstract: In a microlens for observing a microstructure and a camera lens structure using the microlens, the microlens includes a frustum formed on a substrate. The frustum is placed to the observed hole of the microstructure, such that a user's naked eye may approach the substrate to observe a locally enlarging image of the inner surface of the hole. In addition, the microlens is able to be placed longitudinally in a hollow lens tube of a camera lens structure, which may be placed on a surface, such that the microlens may be used at any surface.

Abstract: A buffer structure is installed at the front end of a contact type lens and includes a flexible sheathing ring, a through hole disposed on the sheathing hole and corresponding to the lens, a circular contact pad portion extended outward from a lower end of the sheathing ring, and a circular sheathing portion formed at an upper end of the sheathing ring and connected to the front end of the lens.

Abstract: The innovation is a switch device of micro distance micrography, applying to digital cameras. The main body has a shell-shaped structure with an inner space and a hollow part, which can be penetrated by a lens of digital camera. On the other hand, the shell-shaped structure is jointed and fixed to the main body of the digital camera. The mirror tube ring is a hollow structure and fixed to the main body, and surrounds the hollow part of the main body. The mirror slice frame is jointed to the mirror tube ring, and there is a small hole for mirror slices in the center of mirror slice frame. The mirror slice is mounted to the mirror slice hole. Light source component established between the long mirror tube and mirror slice frame are at least above one. Moreover, the lights produced by certain light source components run through the long mirror tube till the exterior.