|국가/구분||United States(US) Patent 등록|
|우선권정보||GB-8219395 (1982-07-09); GB-8231532 (1982-11-08); GB-8317043 (1983-06-23)|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 0 인용 특허 : 4|
To determine two positional co-ordinates, of a point (D) within a space, a beam (10) a radiation is caused to illuminate a part of the space and is deflected cylindrically over the space, the beam being modulated in phase with the cyclical movement such that the radiation incident upon the point (D) includes enough information to identify the point. Embodiments with rotational (r, θ) and Cartesian (x, y) co-ordinate axes are disclosed.
1. Apparatus for furnishing information sufficient to determine two polor co-ordinated (r, θ) of a point position within a two dimensional bounded space, said polar coordinates measured with respect to a center of said space and a reference angle with said space, comprising: means for generating a beam of radiation, and for shaping said beam to illuminate a part only of the space, said part extending from the center to the circumference of the shape, said part including an edge defined by the following equation: d=r cos [2πKr] where d is a distance betwe...