摘要:
The reflectance of an optical recording medium for which high speed recording using a laser beam with blue wavelength or a shorter wavelength than blue light is possible is adjusted to a predetermined value of no more than 60%. A recording layer 18 of a high-speed write-once type optical recording medium 10 is formed by laminating first and second sub-recording layers 18A, 18B, each of which contains one type of different metal as a primary component. When laser beam of a blue wavelength is irradiated onto the recording layer 18, the irradiation causes the primary component metals contained within each of the first and second sub-recording layers 18A, 18B to diffuse and mix, and this mixing forms a recording mark with an irreversibly changed reflectance. The recording layer 18 is sandwiched between first and second dielectric layers 20, 16, and by adjusting the material and the thickness of the recording layer 18 and the first and second dielectric layers 20, 16, the reflectance of the unrecorded sections can be adjusted to a value within a range from 5% to 60%.
摘要:
A write-once high density optical recording medium capable of a high speed recording that effectively forms space between recording marks. A recording layer 18 of a high speed write-once optical recording medium 10 is formed by laminating a first sub recording layer 18A and a second sub recording layer 18B each containing a metal as its main component. When the recording layer (laminated recording layer) 18 is irradiated with a laser beam, the main component metals contained in the first and second sub recording layers 18A, 18B diffuse and are mixed together by means of the irradiation, thereby forming recording marks whose reflectance have been irreversibly changed due to such mixing. At this time, after an irradiation using a laser beam for forming recording marks, a power level P1 lower than a read power is maintained for a predetermined time Ti.
摘要:
A method of manufacturing a multilayer optical recording medium fabricates a first stamper made of metal and a resin stamper in which a fine protrusion/depression pattern is formed, the fine protrusion/depression pattern of the resin stamper being formed by transferring a pattern from a metal stamper, being deeper than a reversed fine protrusion/depression pattern of the first stamper, and being capable of forming, in one surface of a spacer layer, guide grooves of equal depth to guide grooves formed in one surface of a substrate. By transferring a pattern from the first stamper, the substrate that has guide grooves formed in one surface is fabricated. A recording layer is formed on a surface of the guide grooves of the substrate and a light transmitting resin is applied onto the surface of the recording layer. A pattern is transferred from the resin stamper to the surface of the light transmitting resin to form the spacer layer in which guide grooves of equal depth to the guide grooves formed in the substrate are formed, and the recording layer is formed on the surface of the guide grooves of the spacer layer.
摘要:
A write once medium having a phase change recording layer is provided. In this medium, stable recorded state and high crystallizability of the recording layer are simultaneously realized. The optical recording medium has a recording layer 4 comprising at least one phase change layer 41 and at least one functional layer 42 in contact with the phase change layer. The component constituting the phase change layer 41 and the component constituting the functional layer 42 undergoes a reaction to produce a reaction product when the phase change layer 41 is heated to a temperature equal to or higher than the melting point of the phase change layer 41, and the area where the reaction product has formed experiences decrease in its optical reflectivity, and the optical reflectivity after such decrease is maintained even if the area wherein the reaction product has formed is heated to the crystallization temperature of the phase change layer.
摘要:
An optical recording medium having at least a light-transmitting substrate, a recording layer recorded by heat mode recording, and a reflective layer comprising a metal or a semimetal disposed in this order exhibiting reduced signal noise in the reading and improved recording characteristics are provided. A method for producing such optical recording medium is also provided, and this method includes the step of changing bonding state of the element(s) constituting the reflective layer at least in the area to be recorded.
摘要:
Noise of the read-out signal is reduced in an optical information medium comprising a supporting substrate and a reflective layer disposed on the supporting substrate wherein the reading beam irradiates the medium from the side where the reflective layer is formed. In addition, noise of the read-out signal is reduced without adversely affecting the recording properties in an optical information medium comprising a supporting substrate, and a reflective layer and a recording layer disposed on the supporting substrate in this order wherein the recording beam irradiates the medium from the side where the reflective layer is formed. In the medium, the reflective layer has a crystallite size of up to 30 nm.
摘要:
A wavelength conversion laser light source 100 has: a laser light source configured to generate fundamental wave laser light; and a wavelength conversion element 101 provided with a periodic polarization reversal structure configured to convert the fundamental wave laser light which is incident onto the periodic polarization reversal structure into different laser light in wavelength wherein the wavelength conversion element includes different polarization reversal regions in period; and a polarization reversal axis 102 of at least one of the polarization reversal regions is inclined with respect to an incident optical path of the fundamental wave laser light on the wavelength conversion element.
摘要:
It is aimed to provide an LCD backlight device and liquid crystal display that can suppress light quantity loss and ensure uniform brightness.An LCD backlight device 101 has a laser light source 1 that emits laser light, and a light guiding plate 3 that transforms the laser light from the laser light source 1 into linear laser light, and transforms the linear laser light into a planar laser light, and emits the planar laser light, and the light guiding plate 3 has a third side face 6 that transforms the linear laser light into the planar laser light by reflecting the linear laser light by a plurality of reflection surfaces that are formed along the entrance direction of the linear laser light.
摘要:
A GaN-based semiconductor laser (1) emits first laser light of a single polarization and having a first wavelength. An optical resonator (30) includes a solid-state laser medium which is excited by incidence of the laser light and which oscillates second laser light having a second wavelength different from the first wavelength. A polarization switch (6) switches over at least one of polarization directions of the first laser light and the second laser light to thereby change the wavelength of laser light to be emitted from the optical resonator (30) or the intensity ratio between a plurality of laser light to be emitted from the optical resonator (30). With the above arrangement, a plurality of laser light can be used effectively.
摘要:
A multipurpose projector is provided with a fiber bundle including a plurality of cores fixedly arranged on an input plane and an output plane, laser beam sources for emitting laser beams having directivities, an optical guide unit for modulating the laser beams emitted from the laser beam sources and guiding the modulated laser beams to the input plane of the fiber bundle, a projection lens for enlarging and projecting the laser beams emerging from the output plane of the fiber bundle to a display space, and a projection angle adjusting mechanism disposed on the side of the output plane of the fiber bundle for adjusting projection angles of the laser beams projected from the projection lens. Thus, the projector can have its projection space freely operated and enlarged to extend its application not only to image display, but also to illumination and decoration with colored light.