摘要:
The invention provides highly transparent single crystalline AlN layers as device substrates for light emitting diodes in order to improve the output and operational degradation of light emitting devices. The highly transparent single crystalline AlN layers have a refractive index in the a-axis direction in the range of 2.250 to 2.400 and an absorption coefficient less than or equal to 15 cm-1 at a wavelength of 265 nm. The invention also provides a method for growing highly transparent single crystalline A1N layers, the method including the steps of maintaining the amount of Al contained in wall deposits formed in a flow channel of a reactor at a level lower than or equal to 30% of the total amount of aluminum fed into the reactor, and maintaining the wall temperature in the flow channel at less than or equal to 1200° C.
摘要:
The invention provides highly transparent single crystalline AlN layers as device substrates for light emitting diodes in order to improve the output and operational degradation of light emitting devices. The highly transparent single crystalline AlN layers have a refractive index in the a-axis direction in the range of 2.250 to 2.400 and an absorption coefficient less than or equal to 15 cm-1 at a wavelength of 265 nm. The invention also provides a method for growing highly transparent single crystalline AlN layers, the method including the steps of maintaining the amount of Al contained in wall deposits formed in a flow channel of a reactor at a level lower than or equal to 30% of the total amount of aluminum fed into the reactor, and maintaining the wall temperature in the flow channel at less than or equal to 1200° C.
摘要:
A fixing device includes a rotatable heating member including a heat source and a pressure-applying member pressed against the heating member. The pressure-applying member includes a band-shaped member that extends in a width direction of a medium that passes through a fixing area, a support member opposed to the heating member with the band-shaped member disposed therebetween, and a pressing member including a base-end portion supported by the support member and a free-end portion that extends toward the fixing area. The pressing member has urging portions arranged with intervals therebetween in the width direction. The urging portions are elastically deformable in accordance with a thickness of the medium when the medium passes through the fixing area. The free-end portion urges the band-shaped member toward the heating member so that the band-shaped member is pressed against the heating member.
摘要:
An interface apparatus includes a main unit, an array of interface modules, driver circuitry, and a remote unit. The main unit outputs files to an output unit, is detachably couplable to interface modules and assigns content identifiers to interface modules. The array presents an image to the user and each interface module can be engaged by a user. The driver circuitry is adapted to drive the array to present an image to the user based upon the user's engagement with an interface module. The remote unit is coupled to the output unit and can be detachably coupled to the interface module. When coupled to the interface module, the remote unit can access the assigned identifier and transmit a request signal to the main unit based on the identifier. The request signal is adapted to cause the main unit to output a file identified by the identifier to the output unit.
摘要:
The invention provides an imaging optical system comprising, in order from an object side to an image side thereof, a first lens group of positive refracting power, a second lens group having positive or negative refracting power and a third lens group of positive refracting power. The optical system includes an aperture stop located between an object-side surface in the first lens group and an object-side surface in the second lens group. The lens on the most object side of the first lens group and the lens on the most image side of the third lens group remain constantly fixed, and upon focusing from a far distance to a near distance, only the second lens group moves axially. The third lens group comprises a front lens subgroup of positive refracting power located on the object side and a rear lens subgroup of negative refracting power located on the image side, with the largest axial air separation in the third lens group interposed between them.
摘要:
An interface apparatus includes a main unit, an array of interface modules, driver circuitry, and a remote unit. The main unit outputs files to an output unit, is detachably couplable to interface modules and assigns content identifiers to interface modules. The array presents an image to the user and each interface module can be engaged by a user. The driver circuitry is adapted to drive the array to present an image to the user based upon the user's engagement with an interface module. The remote unit is coupled to the output unit and can be detachably coupled to the interface module. When coupled to the interface module, the remote unit can access the assigned identifier and transmit a request signal to the main unit based on the identifier. The request signal is adapted to cause the main unit to output a file identified by the identifier to the output unit.
摘要:
The eyepiece optical system of the invention is characterized by comprising, in order from the display plane side on which images being viewed are formed toward the exit side, a first lens component of positive refracting power, a reflecting member having only one reflective surface, a second lens component of negative refracting power and a third lens component of positive refracting power. The lens component here means a lens block that, in an optical path involved, contacts air at only two surfaces: the display-plane-side refractive surface and the exit-side refractive surface.
摘要:
A zoom lens system includes in order from an object side to an image side, a first lens unit G1 having a positive refracting power, a second lens unit G2 having a negative refracting power, a third lens unit G3 having a positive refracting power, and a fourth lens unit G4 having a positive refracting power. At the time of zooming from a wide angle end to a telephoto end, distances between the lens units change. The third lens unit includes a first cemented lens component having a concave image-side surface on the image side, and a second cemented lens component having a concave object-side surface on the object side, which is disposed immediately after the image side of the first cemented lens component. The first cemented lens component includes a positive lens, and a negative lens having a concave image-side surface which is disposed on the image side of the positive lens. The second cemented lens component includes a negative lens having a concave object-side surface on the object side, and a positive lens which is disposed on the image side of the negative lens.