Optical system for magnetic tape end detection

Details Optical system for magnetic tape end detection Optical system for magnetic tape end detection

1987-06-29

1989-08-29

Hecker, Stuart N.

Dynamic magnetic information storage or retrieval

Record medium

In container

360 746, G11B 2302

Patent

active

048623059

ABSTRACT:
A magnetic tape cassette having a locking member locking the tape reels and a prism for transmitting light reflected therein across a tape transport path to detect the end of the tape. The prism receives and transmits the light through two holes in the cassette case. A projection on the locking member moves between the holes when the reels are unlocked to block light spuriously reflected from the incident surface of the prism from being detected as light transmitted through the prism.

REFERENCES:
patent: 3614453 (1971-10-01), Johnson
patent: 4631618 (1986-12-01), Ozawa et al.

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