2004
DOI: 10.1117/12.557112
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An increased capacity DataPlay optical disc and drive

Abstract: Based on new market opportunities for consumer electronics devices DataPlay has designed a new version small formfactor optical disc and drive featuring a capacity of 750MB per disc as compared to 500MB per disc of the original product. The NA of the optical pickup has been increased from 0.60 to 0.72. The track pitch of the media has been reduced from 0.74µm to 0.60µm, and the smallest mark size has been decreased from 435nm to 358nm. Details of the new design are presented as well as test results that show t… Show more

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Cited by 7 publications
(7 citation statements)
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References 4 publications
(5 reference statements)
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“…Focusing motions are achieved with the voice coil motor shown at the center of the front suspension. 13) Several reports have described the use of a swing arm to realize a micro-storage system. To improve its material properties, triple layers of steel, aluminum and steel, form the swing arm structure.…”
Section: Initial Seesaw Type Vcm Actuator Design and Simulationmentioning
confidence: 99%
“…Focusing motions are achieved with the voice coil motor shown at the center of the front suspension. 13) Several reports have described the use of a swing arm to realize a micro-storage system. To improve its material properties, triple layers of steel, aluminum and steel, form the swing arm structure.…”
Section: Initial Seesaw Type Vcm Actuator Design and Simulationmentioning
confidence: 99%
“…This paper describes two recent advancements in the DataPlay small form-factor optical drive. [1][2][3][4][5][6][7] First, the numerical aperture (NA) of the objective lens has been increased to 0.85 while still using a red laser (650 nm wavelength), and the track pitch and bit size of the media have been reduced to enable a 1 GB user capacity per 32 mm cartridge. Second, the system has been modified to support rewritable media as well as write once, read-only memory (ROM), and partial ROM media by modifying the optical pickup (OPU) to use a higher power laser diode without changing the physical size of the OPU and maintaining the power dissipation and thermal constraints of the original system.…”
Section: Introductionmentioning
confidence: 99%
“…Figure 1 shows a prototype of a 1 GB rewritable DataPlay cartridge and a DataPlay drive with its unique micro OPU mounted on a carbon fiber composite rotary tracking actuator with tilt focus mechanism. [1][2][3][4][5][6][7] Test results for write once media and rewritable media at 1 GB densities will be given as well as results from detailed thermal simulations of the entire optical drive which show that the high power laser diode is compatible with the system temperature specifications.…”
Section: Introductionmentioning
confidence: 99%
“…DataPlay and LG made cartridge-type SFFO disks, with disk diameter (') = 32 mm, numerical aperture ðNAÞ ¼ 0:72, and wavelength () = 650 nm, and ' ¼ 27:4 mm, NA ¼ 0:85, and ¼ 660 nm, respectively. 1,2) The disk cartridge is used mainly for dust protection, but it causes a rise in manufacturing cost and an increase in the thickness of the SFFO drive deck. Recently, Philips reported that for the CFII-type SFFO drive (5 Â 43 Â 63 mm 3 ) and media, they chose a blue laser system (NA ¼ 0:85, ¼ 405 nm) and a cartridge-free disk.…”
Section: Introductionmentioning
confidence: 99%