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- W2033331639 abstract "This report describes the realization of an actuator for a high-numerical-aperture objective lens, as part of an experimental optical disk player. The player is capable of reading a disk with 10GByte density and is fully compatible with the 120 mm Digital Video Disk Read-Only Disk standard. The objective consists of two lens elements, having one aspherical surface, and a free working distance of 50 micrometers . A special active-tilt-control (ATC) actuator is required to achieve sufficient tolerance for disk cover layer thickness and tilt between objective and disk. The ATC-actuator, containing the objective, is as small as a standard CD ROM objective, and therefore fits in a standard 2D-actuator for focus and radial tracking. The manufacturing and assembly of the ATC-actuator requires specialized prototyping techniques, such as the use of alignment molds, and assembly in a specialized clean room. We have controlled the free working distance within 1.1 micrometers and tilt within 0.7 mrad at 3kHz, while being carried in a Philips actuator, operating at 2kHz. The ATC-actuator was developed to investigate new options for future optical storage systems." @default.
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- W2033331639 date "1999-08-27" @default.
- W2033331639 modified "2023-09-27" @default.
- W2033331639 title "Realization of an active-tilt-controlled high-numerical-aperture two-lens objective for optical recording" @default.
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