New and improved technical tools   Imaging lens selector    Visit

搜索
Search
Your current location:
Homepage
/
/
/
/
GCO-140122 Beam Expanders

Product classification

There is currently no content to display
Please add data record on website background.
Number of views:
1000

GCO-140122 Beam Expanders

$
$
288.5
Market price
$
288.5
GCO-140122 Beam Expanders
Product serial number
Quantity
-
+
Stock:
99
暂时无货
1
Product description
Parameters
Lens diameter:
Driving mode:
adjust:
sensitivity:
Special functions:
brand:
GCO-14 Beam Expanders
 

A beam expander is an optical system for changing the diameters of input and output beams. The product of the diameter and divergence for a laser beam remains constant between input and output. This means that, if the beam diameter increases from input, the divergence of the output will decrease. Beam expanders use this inverse-proportional relationship between the diameter and divergence to expand a laser beam, or to reduce the beam divergence. Low divergence allows for a smaller focus spot of a Gaussian beam.

In summary, beam expanders are used for fine focusing, reducing beam divergence and minimizing diffraction effect. Daheng Beam Expanders (GCO-14) are professionally designed for complicated systems and ideally used in combination with Daheng F-Theta lenses (GCO-31).

 

TECHNICAL NOTES

 

• Type of beam expander
Beam expanders are generally of a focal system; in which two groups of lenses have their focal points coincided. The front and the rear lens group are input and output lens, respectively. There are two types of beam expanders, Galilean and Keplerian, based on the input lens. Galilean beam expander is the most common type of beam expander, which is derived from Galilean telescope. It usually has one negative lens and one positive lens. The front focal point of the negative lens and the front focal point of the positive lens are coincided in front of the input lens. For lens expansion ratios <20x, the Galilean beam expander is most often used because of its simplicity, small package size and low cost. However, the Galilean beam expander is unable to accommodate spatial filters and limited to low expansion ratios. In cases where larger expansion ratio or spatial filtering is required, the Keplerian beam expanders are employed. The Keplerian beam expander has two positive lenses, which the rear focal point of the first lens is positioned at the front focal point of the second lens. In addition, spatial filtering can be instituted by placing a pinhole at the coincided focus point.
 
• Expansion ratio, M
The expansion ratio M is the ratio of the output beam diameter Φout to the input beam diameter Φin. It can be calculated using the focal length of theinput lens and the output lens as follows:
 
As mentioned above, increasing the beam diameter means decreasing the divergence of the beam by inverse proportion. So,
 
where θin is the divergence of the input beam and θout is the divergence of the output beam.
 
 

 

GCO-14 Beam Expanders

 

Part No.

Expansion Ratio

Wavelength

Max. Input Beam Diameter(1/e²)

Input Aperture

Outer

Diameter

Length

Transmitted

Wavefront

Transmission

Damage

Threshold

GCO-140101

3X

355nm

6

8

40

75

<λ/4(RMS)

>98.5%

 

 

10J/cm2@10ns 10HZ 1064nm 

GCO-140102

5X

355nm

4

5.5

40

95

<λ/4(RMS)

>98.5%

GCO-140103

8X

355nm

3

5

40

115

<λ/4(RMS)

>98.5%

GCO-140111

3X

532nm

8

10.5

40

75

<λ/4(RMS)

>98.5%

GCO-140112

5X

532nm

6

8

48

95

<λ/4(RMS)

>98.5%

GCO-140113

8X

532nm

4

8

48

105

<λ/4(RMS)

>98.5%

 

GCO-140121

3X

1064nm

8

10.5

40

75

<λ/4(RMS)

>98.5%

GCO-140122

5X

1064nm

6

8

48

95

<λ/4(RMS)

>98.5%

GCO-140123

8X

1064nm

4

5.5

48

105

<λ/4(RMS)

>98.5% 

 

 

Scan the QR code to read on your phone
We could not find any corresponding parameters, please add them to the properties table

Related downloads

There is currently no content to display
Please add data record on website background.

© 2019 Daheng New Epoch Technology,Inc.   京ICP备05081235号-2

Home     Product      Solution     Resources     Support      Contact us    Powered by www.300.cn

Daheng