Method and device for simulating thermal effects at the interfac

Details Method and device for simulating thermal effects at the interfac Method and device for simulating thermal effects at the interfac

1988-12-19

1990-02-06

Noland, Tom

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250341, 73 7, 738664, 374130, G01N 356, G01N 2184

Patent

active

048990515

ABSTRACT:
A device, for simulating temperature effects at the interface of a head-to-medium interface, is comprised of a unitary block of material which transmits radiation in the infrared (IR) region of the electromagnetic spectrum and which has a wear-resistant property substantially approximating that of the material of an actual magnetic head to be simulated. The unitary block is shaped to have (1) a first forwardly facing surface substantially approximating the dimensions and contour of the working surface of the head to be simulated, and (2) a second rearwardly facing surface substantially approximating the dimensions and contour of a light-transmitting surface of a positive spherical lens the focal plane of which coincides with the forwardly facing surface. Sapphire is selected as a material having a suitable IR-transmitting property and a wear-resistant-property commensurate with one wear-resistant properties of alloy and ferrite materials commonly used in the manufacture of a video magnetic head.

REFERENCES:
patent: 3359783 (1967-12-01), Scheiman et al.
patent: 3612891 (1971-10-01), Ward et al.
patent: 3635085 (1972-01-01), Shimotsuma et al.
patent: 3681682 (1972-08-01), Cox et al.
patent: 3745816 (1973-07-01), Erickson et al.
patent: 3753093 (1973-08-01), Gardner et al.
patent: 4091654 (1978-05-01), Hurtig et al.
patent: 4599266 (1986-07-01), Nakayoma et al.

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