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Beam Expanders
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  • Beam Expanders

  • CASTECH offers two types of beam expanders, fixed magnification and variable magnification. Our product covers diverse magnifications and wavelengths to meet various application requirements.
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Product description:

Beam expander is an optical component built to enlarge the diameter of collimated input beam and reduce beam divergence. It is primarily applied in laser scanning, laser processing, interferometry and remote sensing. A typical Galilean type beam expander consists of one negative lens and one positive lens.

CASTECH offers two types of beam expanders, fixed magnification and variable magnification. The fixed magnification beam expander is with compact design, while the magnification and divergence of variable type are adjustable.

Our product covers diverse magnifications and output diameters to meet various application requirements. Advanced polishing and coating technology have been used to ensure high beam quality and low insertion loss.  

 

Applications:

● Laser scanning

● Short pulsed laser

● Ultra-short pulsed laser

 

 

Fixed Magnification Beam Expander

Variable Magnification Beam Expander

Advantage

• Compact structure

• Lower cost

• Variable magnification

Disadvantage

• Invariable magnification

• Complex structure 

• Higher cost

 

 

Figure: Common beam expander is derived from the Galilean telescopes which consists of a negative lens

and a positive lens that are also separated by the sum of their focal lengths.

 

Beam Expander Model Number:tBE-a-b-c-d-h

Type(t)

Wavelength(a)

Expansion(b)

Thread(c)

Divergence Adjustable(d)

Package(h)

F

(fixed magnification)

V

(variable magnification)

355 nm

532 nm

1064 nm

...

2 (2X)

3 (3X)

  103 (1X-3X)*

  104 (1X-4X)*

  208 (2X-8X)*

...

22

(M22*0.75)

30

(M30*1)

...

A

(Yes)

B

(No)

G01

G02

G03

G04

G05

G06

...

*Only suitable for V (variable magnification beam expander) type products.

 

 

Typical Specifications

Expansion

Material

Input Aperture

Exit Aperture

Max Outside Diameter

2

UVFS

12 mm

26 mm

42 mm

10

UVFS

6 mm

31 mm

46 mm

  2X~8X*

UVFS

3 mm

26 mm

48 mm

*Only suitable for V (variable magnification beam expander) type products.

 

 

Housing dimensions(mm):

G01

 

G02

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