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Blast treatment for light guide products

Light guide products are used to deliver light which came in from one side to the other side effectively and consistently by utilizing internal reflection function of transparent resin material.

Light guide products are commonly used for door trim and interior decorations of automotives to provide gorgeous lighting atmosphere at interior space.

Difference between blast treatment and prism treatment

Blast treatment has no light stripe and provides consistent lighting balance from light incoming edge to another edge by adjusting blast treatment density with stepless manner.

【How the light works for prism treated light guide】

How the light works for prism treated light guide
Incoming light from LED light source is reflected at the prism area and then emitted from light guide

【How the light works for blast treated light guide】

How the light works for blast treated light guide
Incoming light from LED light source is reflected at the blast area and then emitted from light guide

【How blast treatment is applied on tooling】

How blast treatment is applied on tooling
Nozzle
Abrasive grains are sprayed
at high velocities
Slight concavity and
convexity are created
on the tooling surface

Introduction of blast treatment on light guide for a project

車内のライトガイド位置を示した画像
Light guide (indirect light illumination)
Light stream
Light is reflected on switch panel
(surface of the switch panel is piano-black specification)

矢印
Actual product photo

Early development phase
Prism light guide
(It can not be seen directly)
開発初期段階のライトガイドへのブラスト加工
Light reflection on the switch panel was glaring and considered not-suitable for car interior and rejected
Mass production specification
Shot blast light guide
(It can not be seen directly)
量産仕様のライトガイドへのブラスト加工
Light reflection on the switch panelbecome more softer and adopted

Oshino Lamps Ltd. develops various types of optical products by utilizing optical and color-tuning techniques we build for the development of automotive SMLs.