Abstract:
The present invention provides a compact automatic focusing system using a Micro-Electro-Mechanical System (MEMS) unit. The automatic focusing system using the MEMS unit has a small volume and low power consumption, and its operation is very reliable, precise, and fast. The MEMS unit for automatic focusing comprises at least one micromirror, at least one micro-actuator, and at least one micro-converter fabricated on the same substrate by microfabrication technology. By fabricating the micromirror, the micro-actuator, the micro-converter on the same substrate, the volume of the automatic focusing system of the present invention can be greatly reduced. The micro-converter converts the in-plane translation of the micro-actuator to out-of-plane translation of the micromirror to provide a large out-of-plane translation range.
Abstract:
A compact image taking lens system with a lens-surfaced prism of the present invention comprises a prism, an aperture stop, a first lens element, a second lens element, reflecting mirror surface, and image surface, optionally an infrared cut-off filter. By introducing a lens-surfaced prism, the compact image taking lens system with a lens-surfaced prism of the present invention has many advantages over the prior arts in the field of invention, such as compactness in thickness, small number of optical elements, high performance of optical quality, enough space for optional elements such as an infrared cut-off filter and diversity in optical geometries.
Abstract:
A discretely controlled micromirror device provides multiple motions of a micromirror using stepper plate and micromirror bottom support. The discretely controlled micromirror device can be controlled in a low driving voltage. Also, simple motion control is applied by digital controlling and only single voltage is needed for driving the micromirror motion.
Abstract:
The present invention provides a small and fast zoom system using micromirror array lens (MMAL). Thanks to the fast response and compactness of the MMAL as well as absence of the macroscopic mechanical movements of lenses, the zoom system of the present invention fastens the speed of the zooming and reduces the space and weight for the zoom system. Also the present invention provides magnifying the area not on the optical axis and can compensate the aberration of the zoom system.
Abstract:
A new three-dimensional imaging system has been needed to overcome the problems of the prior arts using conventional variable focal length lenses, which have slow response time, small focal length variation, and low focusing efficiency, and require a complex mechanism to control it. The three-dimensional imaging system of the present invention uses the variable focal length micromirror array lens. Since the micromirror array lens has many advantages such as very fast response time, large focal length variation, high optical focusing efficiency, large size aperture, low cost, simple mechanism, and so on, the three-dimensional imaging system can get a real-time three-dimensional image with large depth range and high depth resolution.
Abstract:
Automatic focusing system is provided which comprises a mirror or a plurality of mirrors with a translation device. Automatic focusing can be made by the translation of mirror because focal plane can be changed by the translation of mirror. The translation device makes its motion by the electrostatic, electromagnetic and/or electrothermal forces. The mirror is controlled by the electrical signal from the image processor to get an in-focus image. Also the mirror can be controlled discretely. The image shift by translation is compensated by tilt of mirror and/or image processing.
Abstract:
A beam focusing and scanning system using a micromirror array lens (optical system) includes a light source configured to emit light and a micromirror array lens, including at least one micromirror, optically coupled to the light source, configured to reflect the light onto a projection medium (projection plane). The optical system also includes at least one actuating component coupled to the at least one micromirror, configured to move the at least one micromirror to enable the at least one micromirror to focus the light on the projection medium. The advantages of the present invention include high speed variable focusing and scanning, large focal length variation, phase compensation, high reliability and optical efficiency, low power consumption and low cost.
Abstract:
A beam focusing and scanning system using a micromirror array lens (optical system) includes a light source configured to emit light and a micromirror array lens, including at least one micromirror, optically coupled to the light source, configured to reflect the light onto a projection medium (projection plane). The optical system also includes at least one actuating component coupled to the at least one micromirror, configured to move the at least one micromirror to enable the at least one micromirror to focus the light on the projection medium. The advantages of the present invention include high speed variable focusing and scanning, large focal length variation, phase compensation, high reliability and optical efficiency, low power consumption and low cost.
Abstract:
An automatic focusing system comprises at least one micromirror array lens, an image sensor, and a signal processor. The micromirror array lens images an object and focuses the image on the image sensor. The image sensor receives the light and converts the photo energy of the light to electrical energy in the form of an electrical signal. The image sensor sends the electrical signal, which carries image data concerning the object, to the signal processor. The signal processor receives the electrical signal, compares the image quality of the image data to its focus criteria, and generates a control signal, which it sends to the micromirror array lens to adjust the focal length of the micromirror array lens. This interative process is continued until the quality of the image data meets the focus criteria, and the process is completed within the afterimage speed of the human eye.
Abstract:
An optical pick-up device comprising at least one micromirror array lens. The micromirror array lens enables focusing, tracking, and/or tilt compensation in the optical pick-up device without macroscopic motions. The micromirror array lens provides the device with a simple structure, which can reduce the size, weight, and cost of the recording/reproducing system. The device is also durable for vibration. Optical pick-up devices using an array of micromirror array lenses can increase the recording/reading speed without macroscopic motions. The recording/reading speed can be increased by adding more micromirror array lenses to the lens array. The present invention can also be used to record/read information on/from a multi-layered optical disc.