摘要:
PROBLEM TO BE SOLVED: To provide an optical pickup device capable of interchanging three types of optical disks of BD/DVD/CD having a plurality of information recording layers with a common objective lens regardless of low cost, and an optical information recording and reproducing device.SOLUTION: If the objective lens of the optical pickup device is used, aberration can be changed in an under (insufficient correction) direction when a wavelength fluctuates to a long-wavelength side. Consequently, aberration that occurs when the temperature of the optical pickup device goes up can be suppressed. Since an objective lens that can maintain stable performance even during temperature change can be provided even in the case that the objective lens is made of plastic, a temperature characteristic during the use of a second optical disk can be made satisfactory. As a result of this, a factor that should displace a coupling lens in an optical axis direction during the use of the second optical disk is eliminated, and the optical pickup device can record/reproduce information to/from an information recording surface of the second optical disk satisfactorily even with the coupling lens fixed.
摘要:
PROBLEM TO BE SOLVED: To provide a lens unit and its manufacturing method capable of precisely positioning and incorporating the lens into a holder regardless of geometric accuracy of the lens side face.SOLUTION: A lens 10 and a holder 20 are connected without having portions positioned each other in relation to a perpendicular direction to an optical axis OA. If geometrical dimensional accuracy of a side face 10c of the lens 10 set at the perpendicular direction to the optical axis OA is low, the lens 10 can be fixed in a precisely positioned state to the holder 20. In a lens unit, the lens and the holder are joined by an adhesive agent. In this case, the lens 10 and the holder 20 can be fixed strongly and moreover, a relative position of the lens 10 and the holder 20 can be easily arranged by the thickness of an adhesion part 41, and the lens 10 and the holder 20 can be relatively and precisely positioned and fixed.
摘要:
PROBLEM TO BE SOLVED: To provide a long stretched film in which occurrence of wavy forms and streaks when stretching the film in an oblique direction is suppressed or occurrence of streaks when coating and curing a surface processing layer after stretching is suppressed, and which can be subjected to continuous oblique stretching, to provide a method for producing the long stretched film, and to provide a long polarizing plate and a liquid crystal display device provided with the stretched film.SOLUTION: In the method for producing the long stretched film in which a parallel slow axis has angle variations within the range of ±0.5° with respect to the width direction of the film, stretching is performed in an oblique direction in such a manner that it has the parallel slow axis at an angle within the range of 10 to 45° with respect to the conveying direction of the long film, and thereafter, both the edges of the film are stretched at an angle within the range of -90 to -70° with respect to the conveying direction and also at a degree of stretching within the range of 0 to 20% by clamping units.
摘要:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a light confining film to manufacture the light confining film containing thermoplastic resin easily and efficiently in a mass production scale, to provide the light confining film manufactured by the same, capable of improving an efficiency of photovoltaic power generation, and to provide a solar cell equipped with the light confining film.SOLUTION: The manufacturing method of the light confining film for a solar cell, having an uneven shape structure on a surface of a film base material containing thermoplastic resin, comprises processes of: coating the film base material containing the thermoplastic resin with a mixed solvent containing a poor solvent; and drying the film base material coated with the mixed solvent.