DIFFRACTION OPTICAL ELEMENT AND METHOD FOR TURNING THE SAME
PROBLEM TO BE SOLVED: To manufacture a diffraction optical element having the grating height with high accuracy. SOLUTION: The preform of the element is formed so that the machining allowance of the grating effective part of the diffraction optical element by final turning is made uniform in the who...
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| Zusammenfassung: | PROBLEM TO BE SOLVED: To manufacture a diffraction optical element having the grating height with high accuracy. SOLUTION: The preform of the element is formed so that the machining allowance of the grating effective part of the diffraction optical element by final turning is made uniform in the whole area and then the preform is subjected to the finish machining. |
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