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Optical Pickup Heads

Optical Pickup Heads

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.

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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.
It is also expected that the market share of multi-drives (or COMBO's) that are compatible with several different standards will continue to increase.
Optical disks will become an increasingly convenient and familiar media for users.

Optical Pickup Heads2

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.

Furthermore, since drive manufacturers have adopted short wavelength lasers for optical pickup beam sources, NITTO OPTICAL has been promoting technological development on grinding and coating to meet the specification for 3 wavelengths of infrared, red and blue. These achievements have been announced at exhibitions.

 

Examples of Products for Optical Pickup Heads

  Products Examples of Applications
Prisms Dichroic Prisms Optical Pickup Heads
Beam Shaping Prisms
(Littrow Prism)
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
Others Gratings
Aperture-limiting Elements




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