광학 구면 렌즈

볼렌즈

Name: 볼렌즈
Rating: 4.5 (100 reviews)

구형 렌즈는 가장 간단한 형태의 광학 렌즈입니다. 구형 렌즈를 이용한 이미징의 기본 원리는 굴절입니다. 빛이 한 매질(예: 공기)에서 밀도가 다른 다른 매질(예: 유리)로 이동할 때, 진행 방향이 바뀝니다. 구형 렌즈의 초점 거리(f)는 렌즈의 지름(D)과 렌즈를 구성하는 물질의 굴절률(n)에 따라 달라집니다. 근사 공식은 다음과 같습니다: f ≈ D / (4(n-1))

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볼렌즈의 장점

Simple structure and low cost
Strong symmetry

Their optical characteristics are the same from any direction, with no directionality, making installation convenient.
Short focal length and high numerical aperture

They can achieve a high numerical aperture (NA) at a very short working distance, thus converging a large amount of light.
Robust and durable

Compared to complex lens groups, a solid sphere is less prone to misalignment or damage due to mechanical stress.

사양 볼렌즈

기판 재료	H-K9L(CDGM), 사파이어, 루비, JGS1, JGS2, 실리콘, 고붕규산염 등
차원	0.5mm~80mm
직경 공차	일반적으로 ±0.1mm, 최상급 오차 범위는 ±0.005mm입니다.
구형도	0.01mm(10µm), 0.005mm(5µm), 0.001mm(1µm)
중심 공차	±0.03mm~0.05mm
표면 품질	60/40, 40/20, 20/10, 10/5

일반적인 적용 분야

Fiber Optic Communication

- Fiber Optic Coupling: Used to efficiently couple light emitted from a laser diode into a single-mode fiber, or to couple light from two fibers. This is the most classic and widely used application of ball lenses. - Optical Isolators/Circulators: Ball lenses are used internally for collimation and focusing of light.
Sensors

In some optoelectronic sensors and barcode scanners, they are used to converge reflected light onto the detector.
Endoscopes and Micro-Optical Systems

In extremely confined spaces, ball lenses can be used as miniature objectives or condensers.
Laser Processing

In some low-power laser marking or engraving equipment, they are used to focus laser beams.
Teaching and Demonstration

Due to their simple structure, they are ideal teaching aids for explaining basic optical concepts such as refraction, focal length, and aberrations.