看起來你不是TradeKey.com的會員。 立即註冊,與全球超過7百萬的進口商和出口商建立聯繫。
点击注册--免费! |
Book call on your favorite time
Code
       

By Signing Up. I agree to TradeKey.com Terms of Use, Privacy Policy, IPR and receive emails related to our services

Amazon Services

Fuzhou Alpha Optics Co., Ltd

14Gulou Industrial Park Jinshan Juyuanzhou Fuzhou,Fuzhou,Fujian,China

查看电话号码

免费会员

Hopkins Rod Lens

China

Alpha optics

( Negotiable ) 获取最新报价

-

-

5 Piece

hard paper package

25-30days

200000 Piece per Month

T/T, D/P, Western Union

-

现在联系

产品规格

Dia : from1.5mm-25mm Dia. Tolerance : +/-0.05mm(Standard); up to +/-0.002mm(Precision) Length : From 1.0mm to 80.0mm Length Tolerance : +/-0.1mm(Standard); up to +/-0.002(Precision) Surface Figure : 2 lambda @ 632.8nm(Standard), up to lambda/4 @632.8nm(Preci Surface Quality : 60/40(Standard); 20/10(Precision)

详情

Hopkins Rod Lens

1.Overview

 

The rod-lens employed in the Hopkins system consists of a singlet field lens and a doublet aperture lens which

 are both cemented onto a cylindrical rod.

Modern endoscopes typically utilise much longer lenses called Hopkins Rod Lenses than traditional

achromatic doublets as relay optics. The advantage of the rod lens designs is that the chief ray bundle

 can be confined more tightly to the optical axis by reducing the ray divergence in the air gaps between

 the lenses. This reduces vignetting, one of the most severe problems in small diameter rigid endoscopes.

The image also forms further down the endoscope tube, which reduces the number of air-to-glass interfaces

 in the system.

The mounting of rod lenses is also simpler than thin achromats. The rod lenses tend to tilt less when they are

 assembled into the inner lens tube. Also, since the spacers are shorter in a rod lens design, they can be

 made thinner which increases the clear aperture. Rod lenses are typically fine ground on their outer surface

 to reduce stray reflection.

 

2. Material

 

BK7 grade A optical glass or Fused Silica

 

3. Specification

 

Dia. From 1.5mm to 25.0mm

Dia. Tolerance: +/-0.05mm(Standard); up to +/-0.002mm(Precision)

Length: From 1.0mm to 80.0mm

Length Tolerance: +/-0.1mm(Standard); up to +/-0.002(Precision)

Surface Figure: 2 lambda @ 632.8nm(Standard), up to lambda/4 @632.8nm(Precision)

Surface Quality: 60/40(Standard); 20/10(Precision)

 

联系我们

联系人: Helen

公司名称:Fuzhou Alpha Optics Co., Ltd

办公地址:14Gulou Industrial Park Jinshan Juyuanzhou Fuzhou, Fuzhou, Fujian, China,

电话号码:

查看電話號碼

至,

Helen < Fuzhou Alpha Optics Co., Ltd >
我想知道:

來自其他供應商的更多產品

1.56 UV-400 Photochromic Brown lens bifocal Optical Lens 1.56 UV-400 Photochromic
1.56 Photochromic HMC optical lens 1.56 Photochromic HMC
3D glasses 3D glasses
Nylon or PC Polarized Lens Nylon or PC Polarized Lens
RX Lens for FreeForm and Transitions RX Lens for FreeForm and
Prescription Optical Lens Prescription Optical Lens
Optical Lens Optical Lens
1.1.1stock lens 1.50 HMC Single Vision optical resin lenses high quail 1.1.1stock lens 1.50 HMC
progressive lens, omega lens, lenticular lens, bifocal lens, semi-finished lens progressive lens omega
Cylindrical lens Cylindrical lens
readdy-made optical frame readdy-made optical frame
1.60 MR-8 Best selling HC-HMC-SHMC coating corrective lenses 1.60 MR-8 Best selling
Famous style new model optical frame TR90 Famous style new model
Bescon Brand One Day Color Contact Lens Bescon Brand One Day Color
Plano-Convex Lens Plano-Convex Lens
AR Coating AR Coating