| 摘要 |
<p>PURPOSE: A high speed trigonometric function calculation method using a trigonometric function table is provided to process a trigonometric function at high speed using a rotation angle value which is measured in real time and the trigonometric function table. CONSTITUTION: A rotation sensor module measures a rotation angle of optical equipment and outputs it as a pulse type (S110). A field programmable gate array (FPGA) draws a sine function value and a cosine function value corresponding to the outputted rotation angle from a trigonometric function table of a memory module and converts a polar coordinate value of the rotation angel into an orthogonal coordinate value (S120). An output module outputs the converted orthogonal coordinate value (S130). [Reference numerals] (S110) Measure a rotation angle of optical equipment and output it as a pulse type; (S120) Draw a sine function value and a cosine function value corresponding to the outputted rotation angle from a trigonometric function table of a memory module and convert a polar coordinate value of the rotation angel into an orthogonal coordinate value; (S130) Output the converted orthogonal coordinate value</p> |
