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Optical Pickup Heads
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Optical Pickup Heads are optical units for playing and recording information from CD (compact disks), DVD (digital versatile disks), MO and MD (magnet optic disks and mini disks) which are loaded in optical disk drives and players. Currently, optical disk drives are installed in audio devices and almost all computer equipment including laptop computers. To Optical Pickup Heads Mechanism>> In optical disks, there is the next generation DVD (Blu-ray disks and HD DVD), which can play and record in larger amounts of information than current DVD in addition to CD-R, DVD±R, which can record, and CD-RW, DVD±RW and DVD RAM which can be written and erased many times like floppy disks and MD. It is expected that optical disk drive manufacturers will keep challenging the further development for this technology. |
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Since the appearance of the compact disks in the early 1980th, NITTO OPTICAL has been working on the improvement for various optical parts technology necessary for optical pickup heads. During this time, the development of optical pickup technology became the key along with the technological progress for larger disk capacity. NITTO OPTICAL has consistently supplied large quantities of optical parts such as polarizing beam splitters for reflecting, transmitting and splitting light waves, 1/4 and 1/2 wave plates that change the phase of light waves using doubly refracting crystals, and grating (DOE: Diffraction Optical Elements) that diffract light waves to optical pickup manufacturers.
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Examples of Products for Optical Pickup Heads
Products | Examples of Applications | ||
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Prisms | Dichroic Prisms | Optical Pickup Heads | |
Beam Shaping Prisms (Littrow Prism) |
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Wedge Prisms | |||
Polarizers/ Polarizing Prisms | Beam Splitters | ||
Polarizing Beam Splitter | |||
Non-polarizing Beam Splitters | |||
Non-phase Retardation Beam Splitters | |||
Wave Plates (λ/2, λ/4) | |||
Wollaston Prisms | |||
Thin Film Coatings | Reflecting Mirrors | Total Reflection Mirror | |
Laser Mirrors | |||
Half Mirrors | |||
Attenuators | Anti-reflection Attenuator |
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Others | Gratings | ||
Aperture-limiting Elements |