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商品の詳細:
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| 使用: | オプティカル | 構造: | 双面孔形 |
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| 形状: | 球状 | 表面: | 磨いたもの |
| トランスミッション: | 90%に | コーティング: | 利用可能 |
| 適用する: | 光学と照明 | OEM: | 利用可能 |
| ハイライト: | Optical Double Concave Lens,AR coating optical lens,Optical lens for camera and telescope |
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Core: Precision-crafted from high-grade optical glass (e.g., BK7, Fused Silica) or specialized optical plastics.
Coating: Multi-layer Anti-Reflection (AR) coating deposited onto both concave surfaces. Common coating types target specific wavelength ranges (e.g., Visible: 400-700nm, NIR).
Shape: Features two inward-curving (concave) surfaces, causing light rays to diverge.
Focal Length: Has a negative focal length (e.g., -25mm, -50mm, -100mm).
Optical Power: Acts as a diverging lens.
AR Coating Effect: Significantly reduces surface reflections (often to <0.5% per surface), increases light transmission (typically >98% per surface in target band), minimizes ghosting/flare, and improves contrast.
To diverge incident light rays. Parallel rays entering the lens spread out as if originating from a virtual focal point in front of the lens.
To correct optical aberrations, particularly in compound lens systems (e.g., compensating for convergence/spherical aberration caused by positive lenses).
To increase the effective focal length of optical systems when placed before a primary lens.
To reduce overall system length in some designs.
Cameras: Used in telephoto lens groups to extend focal length; in zoom mechanisms; for aberration correction; and as field flatteners. AR coating is vital for image clarity and light efficiency.
Projectors: Essential for beam expansion, aberration correction (especially in projection lenses), and focal length adjustment within illumination and projection paths. AR coating maximizes brightness and contrast.
Telescopes: Employed in eyepieces (e.g., Huygens, Ramsden designs) for magnification and field correction; in Barlow lenses to increase effective focal length/magnification; and for collimation adjustments. AR coating enhances transmission crucial for faint celestial objects.
Laser Systems: For beam expansion and optical path control.
| Material | Optical Glass, Fused Silica, quartz |
| Diameter Tolerance | +0/-0.15 mm |
| Thickness Tolerance | +/-0.15 mm |
| Cler Aperture | over 90% |
| Surface Quality | 80/50~10/5 |
| Transmission | above 92% |
| Chamfer | 0.1-0.5 mm x 45° |
| Focal Length Tolerance | +/-1.5% |
| Back Focal Length Tolerance | +/-1.5% |
| Coating | available |
| Usage | optical system, photographic sysem, Lighting system e.g. laser, camera, projector, magnifier etc. |
コンタクトパーソン: Mr. Dai
電話番号: +86-13764030222
ファックス: 86-21-58508295
