&lt;title&gt;Practical fabrication of an optical flying head for a near-field recording system&lt;/title&gt;

Kojima, Naoto; Mizuno, Takashi; Hitosugi, Taro; Kawashima, Atsumichi

doi:10.1117/12.453435

Cited by 11 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the NFR system [1][2] has been introduced as a new optical data storage method to realize higher density recording beyond the diffraction limit. It uses a Solid Immersion Lens (SIL) [3][4][5][6][7] , which is made of a high refractive index (>1.0) to make the Numerical Aperture (NA) larger than one. Within the near-field range below the SIL, the spot size is smaller than the wavelength of the light.…”

Section: Introductionmentioning

confidence: 99%

Error analysis and alignment in the optical head of near field recording system

2007

View full text Add to dashboard Cite

In this paper, error analysis and alignment for the optical head of Near Field Recording (NFR) system are presented. Using optical systems analysis tool -CODEV, the NFR system are designed. After design, we fabricate the NFR system and test the reading & writing performance of the NFR system. The test results show that the reading & writing performance is not good enough. In order to find the cause of the performance drop in the NFR system, assembly tolerances of the optical head of NFR system are simulated. The simulation results show that the tolerance in the optical head of the NFR system is very tight. So in order to align the optical head within the tolerance limit, we design and fabricate an alignment system which can detect the RMS wavefront aberration and align the optical head. Before the experiment, we model the interferometer (by CODEV) and analyze the interference pattern trend. The interference patterns will be compared with the experiment results. The system can control the position of optical head of the NFR system using the pico-motor actuators and the capacitance type gap sensors. Using the system, we can align the objective lens and the solid immersion lens in 5-axis. Finally, we verify the alignment performance of the optical head using the alignment system. We can align the optical head within tolerance limit using the proposed system.

show abstract

Section: Introductionmentioning

confidence: 99%

Error analysis and alignment in the optical head of near field recording system

2007

View full text Add to dashboard Cite

show abstract

“…On the other hand, the Near Field Recording (NFR) system [1][2] has been introduced as a new optical data storage method to realize higher density recording beyond the diffraction limit. It uses a Solid Immersion Lens (SIL) [3][4][5][6][7] , which is made of a high refractive index (>1.0) to make the Numerical Aperture (NA) larger than one. Within the near-field range below the SIL, the spot size is smaller than the wavelength of the light.…”

Section: Introductionmentioning

confidence: 99%

Optimal tolerance allocation in the optical head of near-field recording system

et al. 2006

View full text Add to dashboard Cite

In this paper, error analysis and tolerance allocation methods for the optical head of NFR (Near Field Recording) system are presented. We fabricate the NFR system and test the reading & writing performance of the NFR system. The test results show that the performance is not good enough. In order to find the cause of the performance drop in the NFR system, assembly and manufacturing tolerances in the optical head of NFR system are simulated. The tolerances analysis result shows that it needs to allocate the tolerances of the optical head of NFR system. So we proposed optimal compound tolerance allocation method using WOW (worst on worst) method and Monte-Carlo method base on sensitive analysis of the optical system. We used two tolerance allocation methods to allocate the compound tolerance in the optical head of NFR system. The results show that WOW method is an over-design method and the Monte-Carlo method is the optimal method of tolerance allocation in optical system.

show abstract

“…Recently, two optical flying heads based on SIL optics, with a view to the practical application, have been proposed for near-field recording (NFR). [1][2][3] The OFH is important for the construction of a SIL-based NFR system with small disk-media gap size and high data transfer rate. The flying head is very similar to the slider of a hard disk drive (HDD), but it has an optical unit on the upper side to transmit light from the laser diode to disk or from the disk to photodiode.…”

Section: Introductionmentioning

confidence: 99%

Selection of optical modes in a ribbon fibre with a modulated gain

Vysotskii¹,

Napartovich²,

Trapeznikov³

2003

Quantum Electron.

View full text Add to dashboard Cite

We studied the effective design of a head structure to realize a practical optical flying head (OFH) for near-field recording (NFR) with both high optical performance and reasonable tolerance in assembly. In the design of the OFH, several major issues such as productivity, performance and reliability were considered. In order to realize a stable and reliable OFH with high performance, we designed a slider structure, air bearing surface (ABS), coil for magneto optical (MO) recording, main optical pickup unit (OPU), suspension and gimbal structure, disk media for good head-disk interface, and so forth. With a view to the reliability of OFH, durability and flying stability for various plastic disks as well as on a conventional glass disk were investigated. Also with a view to the practical applicability, we proposed two OFH designs with simple and effective slider structures, namely a slot slider and a barrel slider. In addition, basic flying characteristics and optical performance of the OFH mounted with high NA optics were tested and evaluated. Attempts have been made to develop engineering plastic and polycarbonate disks as well as glass as disk media for NFR application. The durability of developed disks was examined and compared with the aim of their practical application.

show abstract

<title>Practical fabrication of an optical flying head for a near-field recording system</title>

Cited by 11 publications

References 0 publications

Error analysis and alignment in the optical head of near field recording system

Error analysis and alignment in the optical head of near field recording system

Optimal tolerance allocation in the optical head of near-field recording system

Selection of optical modes in a ribbon fibre with a modulated gain

Contact Info

Product

Resources

About