Abstract:
A sunlight collector module is disclosed, capable of collecting the sunlight from the sun for the illumination at a certain position, and of reflecting portion of the sunlight to a solar photovoltaic module. The disclosed sunlight collector module comprises: a base, a first reflective element disposed on the base, a second reflective element, a light-guide element, and a beam splitting element, wherein the second reflective element is disposed on a side, which is opposite to the base, of the first reflective element. Besides, the light-guide element disposed on a side, which is opposite to the second reflective element, of the first reflective element. In addition, the beam splitting element is disposed between the first reflective element and the light-guide element, for reflecting portion of the sunlight to the solar photovoltaic module. The non-reflected portion of the sunlight passes through the beam splitting element and enters the light-guide element.
Abstract:
A displaying device for projecting image onto pupils includes a light source emitting a light beam, a first light splitter reflecting the light beam, an image unit providing an image message, a displayer integrating the light beam form the first light splitter and the image message from the image unit into an image beam, a first lens focusing the image beam and a second light splitter transforming the image beam into a enlarged virtual image and projecting the enlarged virtual image onto user's pupils for a user to watch. The second light splitter is placed in front of user's pupils and is transparent to transmit the view around the user to user's pupils.
Abstract:
A sunlight collector module is disclosed, capable of collecting the sunlight from the sun for the illumination at a certain position, and of reflecting portion of the sunlight to a solar photovoltaic module. The disclosed sunlight collector module comprises: a base, a first reflective element disposed on the base, a second reflective element, a light-guide element, and a beam splitting element, wherein the second reflective element is disposed on a side, which is opposite to the base, of the first reflective element. Besides, the light-guide element disposed on a side, which is opposite to the second reflective element, of the first reflective element. In addition, the beam splitting element is disposed between the first reflective element and the light-guide element, for reflecting portion of the sunlight to the solar photovoltaic module. The non-reflected portion of the sunlight passes through the beam splitting element and enters the light-guide element.
Abstract:
An optical system (20) for efficiently collimating an elliptical light beam includes a light source (21), a first lens (22), a second lens (23), and a third lens (24). The light source is adapted for providing an elliptical light beam defining different diverging angles in different directions, wherein any cross-section of the elliptical light beam emitted from the light source defines a long axis and a short axis which are perpendicular to each other. The first lens, the second lens, and the third lens are used for reconfiguring the elliptical light beam, thus obtaining a round light beam having equivalent short axis and long axis, and equivalent diverging angles in both horizontal direction and vertical direction. Optical centers of the first lens, the second lens, and the third lens commonly define a common optical axis along which the elliptical light beams travels.
Abstract:
An optical pickup head (100) for a high density recording and/or reproducing device compatible with first and second optical recording media. The pickup head includes a first light source (11) emitting first light beams with a first wavelength, a second light source (12) emitting second light beams with a second wavelength greater than the first wavelength, a prism unit (3), a collimating lens (4) located beside the prism unit for collimating incident first and second light beams, and an objective lens (7) for receiving the first and second light beams and transmitting the first and second laser beams to the first and second recording media respectively. The prism unit includes a first portion facing the first light source and receiving the first light beams, a second portion facing the second light source and receiving the second light beams, and an aspherical surface for the second light beams to pass therethrough.
Abstract:
An optical pickup head (100) for a high density recording and/or reproducing device compatible with three types of optical recording media. The pickup head includes a first light source (11a) emitting first beams with a first wavelength, a second light source (12a) emitting second beams with a second longer wavelength, a third light source (13a) emitting third beams with a third even longer wavelength, a prism unit (3), a collimating lens (4) located beside the prism unit, and an objective lens (7) for receiving the light beams and transmitting them to the recording media respectively. The prism unit includes a first portion facing the first source and receiving the first beams, a second portion facing the second source and receiving the second beams, a third portion facing the third source and receiving the third beams, and first and second aberration-correcting portions for the second and third beams to pass therethrough.
Abstract:
A image pick-up lens system includes: a first lens with positive diffractive power, a second lens with negative diffractive power, a third lens with positive diffractive power, and a fourth lens with negative diffractive power. The first lens, the second lens, the third lens and the fourth lens are aligned in that order from an object side to an image side, and each of the four lenses is an aspheric lens made from a plastic material.
Abstract:
An automatic focusing method includes the following steps: providing a digital camera module, which includes a lens member, an image sensor member, a distance-measuring member, a signal-processing member, a drive control member, and a drive member; measuring an object distance using the distance-measuring member, and transmitting the object distance to the signal-processing member for generating a control signal; the drive control member driving the drive member according to the control signal; and the drive member driving the image sensor member or the lens member to a position determined by the control signal. The step of providing the digital camera module includes: providing the lens member, the image sensor member and the distance-measuring member; measuring a depth of focus of the lens member; establishing a range of error of movement of the drive member; and selecting a suitable signal-processing member, drive control member, and drive member.
Abstract:
A liquid crystal shutter (100) and a camera (200) with therein. The liquid crystal shutter (100) includes a power supply (10), a switch (20) and a liquid crystal box (40), all parts are electrically connected and form a control circuit. The liquid crystal box (40) includes a first electric plate (42), a first polarizing filter (424), a second electric plate (44), and a second polarizing filter (444). A predetermined amount of liquid crystal (46) is contained between the first electric plate (42) and the second electric plate (44). The first polarizing filter (424) is formed on a surface of the first electric plate (42). A second polarizing filter (444) is formed on a surface of the second electric plate (44). The axial direction of the second polarizing filter (444) is perpendicular to that of the first polarizing filter (424).
Abstract:
A image pick-up lens system includes: a first lens with positive diffractive power, a second lens with negative diffractive power, a third lens with positive diffractive power, and a fourth lens with negative diffractive power. The first lens, the second lens, the third lens and the fourth lens are aligned in that order from an object side to an image side, and each of the four lenses is an aspheric lens made from a plastic material.