- 레이저 프로젝터의 스페클 저감을 위한 광학 소자 설계 및 제작
- ㆍ 저자명
- 이재용,김영주,Lee. Jae-Yong,Kim. Young-Joo
- ㆍ 간행물명
- 정보저장시스템학회논문집
- ㆍ 권/호정보
- 2014년|10권 2호|pp.55-60 (6 pages)
- ㆍ 발행정보
- 정보저장시스템학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Laser projector has many advantages of high brightness, high resolution and small size, but the huge drawback of image degradation called speckle which generated by coherence of laser and roughness of surface interrupts their general use. There are many methods to reduce speckle pattern, but they need effective optical systems to realize display to the far field with huge volume. We designed speckle reduction element by using microlens with controlled curvature to reduce spatial coherence. Vibration element was also applied to reduce temporal coherence which considered response time of eye. Designed element was fabricated by simple reflow method and imprinting method. From the results, the fabricated element performed 48.33% of speckle reduction efficiency and 41.29% of optical efficiency with a single doublet lens.