Realization of high-precision micro-groove forming with roll molds for optical films

[Issue]
Video devices such as TVs and displays are becoming higher resolution types, such as "4K8K", and having smaller and more complex structures such as xR (VR/AR/MR, etc.) goggles. In order to achieve these technologies, finer machining of precision molds for optical films and optical elements is required.


[Solution]
The use of fine cutting tools with mono-crystal diamond enables high-precision fine groove forming with continuous pitch in the machining of roll molds for optical films. Mono-crystal diamond has excellent wear resistance and contributes to the long-time continuous machining of large rolls.

Realization of high-precision micro-groove forming with roll molds for optical films 画像 Realization of high-precision micro-groove forming with roll molds for optical films 画像
  • Example of mono-crystal diamond ultrafine cutting tool edge shape

    Example of mono-crystal diamond ultrafine cutting tool edge shape 画像
  • Reference example of nano radius ultrafine cutting tool (radius size under R1μm)

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    Expected effects for optical parts mold are contributing smoother release ability, improvement of surface texture, and suppression of rainbow reflection.

    Supposed production range: R100nm under R800nm


Applicable tool

Mono-crystal diamond ultrafine cutting tool

Standard Specification [Nose angle under 15°] [Size: mm]