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Hopkins Rod Lens  Hopkins Rod Lens  Hopkins Rod Lens
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Hopkins Rod Lens

( Negotiable )

|

5 Piece Minimum Order

País:

China

N º de Modelo:

Alpha optics

Precio FOB:

( Negotiable ) Obtener el precio más reciente

Lugar de origen:

-

Precio de pedido mínimo:

-

Cantidad de pedido mínimo:

5 Piece

Detalle de embalaje:

hard paper package

El tiempo de entrega:

25-30days

Capacidad de suministro:

200000 Piece per Month

Tipo de pago:

T/T, D/P, Western Union

Grupo de productos :

-

Contactar ahora
Miembro Básico

Persona de contacto Helen

14Gulou Industrial Park Jinshan Juyuanzhou Fuzhou, Fuzhou, Fujian

Contactar ahora

Especificaciones del producto

  • 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)

Descripción del producto

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 *5.0mm

Dia. Tolerance: +/*0.*5mm(Standard); up to +/*0.**2mm(Precision)

Length: From 1.0mm to *0.0mm

Length Tolerance: +/*0.1mm(Standard); up to +/*0.**2(Precision)

Surface Figure: 2 *@********************up to lambda/4

País: China
N º de Modelo: Alpha optics
Precio FOB: ( Negotiable ) Obtener el precio más reciente
Lugar de origen: -
Precio de pedido mínimo: -
Cantidad de pedido mínimo: 5 Piece
Detalle de embalaje: hard paper package
El tiempo de entrega: 25-30days
Capacidad de suministro: 200000 Piece per Month
Tipo de pago: T/T, D/P, Western Union
Grupo de productos : -

Send a direct inquiry to this supplier

A:

Helen < Fuzhou Alpha Optics Co., Ltd >

quiero saber: