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ETL/EDL/NEDL
Focal length f
Length L
Numerical aperture (NA)
Working distance (WD)
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These lenses are manufactured with a synthetic fused silica material and it has a high transmittance value in the ultra-violet wavelength of 180 − 400nm. They have excellent performance and are ideal for focusing and imaging applications. There is no adhesive or heat absorption material used to produce these lenses, as a result they show high resistance to the ultraviolet light.

◦They are made of 2 or 3 spherical lenses and they offer correction on spherical and comatic aberration.
◦Standard focal lengths for Excimer laser with 248nm, 266nm and 355nm.
◦NA 0.1 or below (ETL model NA 0.25) can be focused to the diffraction limit.

Related product
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Technical Data
Documents/Downloads
Guide

▶Products that are not listed in the table or in the catalog such as high pulse lasers or different wavelengths are available upon request, please contact our Sales Division.
▶Protective Windows is sold separately.
W3081
▶For detail on focal length of each wavelength, please see “wavelength characteristic of the focal length data” on “Technical Data”.

Attention

▶These focusing lenses are made for use to image an object located in an infinitive distance or using a point of source as a parallel light.
▶The correct direction to input a parallel light is the side with barrel lettering. If the direction is wrong, the spherical aberration will be increased and the image unfocused.
▶If Focusing lens is used with the designed wavelength the spherical aberration and transmission will be poor.
▶Usage with high power laser or near a high temperature light source, the high heat build-up in the lens may alter the focal length. To avoid this, heat prevention is required.
▶To reduce the focus spot size, ensure that the input beam diameter (1/e2) is reduced to half of the effective diameter of the focus lens.
▶These focusing lenses are not chromatic lenses; they are not optically corrected.
▶The lenses have 4% of reflectivity per surface; therefore about 20% of loss is expected in transmission.

Common Specifications
MaterialSynthetic fused silica for Excimer Laser
Material of frameAluminum (Finishing: Black anodized)
Design wavelength248nm
CoatingUncoated
Acceptance angle±1°
Outline Drawing

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Schematic

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Reference Data
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Part Number
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    JP Yen Stock Qty
ETL-30-40P
ETL-30-50P
ETL-30-60P
ETL-30-80P
NEDL-30-100P
NEDL-30-150P
NEDL-30-200P
EDL-50-100P
EDL-50-150P
EDL-50-200P
EDL-50-250P
EDL-50-300P

39.6mm

22mm

0.34

31.1mm

49.8mm

22mm

0.27

41.6mm

59.7mm

22mm

0.23

52.4mm

79.8mm

22mm

0.17

73.2mm

99.9mm

12mm

0.14

94.6mm

149.3mm

12mm

0.09

144.6mm

199.3mm

12mm

0.07

194.7mm

100.4mm

20mm

0.24

87.1mm

149.6mm

20mm

0.16

137.9mm

199.1mm

20mm

0.12

187.8mm

249mm

20mm

0.09

238mm

298.6mm

20mm

0.08

288mm

RoHS  

¥110,000

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RoHS  

¥110,000

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RoHS  

¥110,000

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US
RoHS  

¥110,000

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US
RoHS  

¥69,000

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US
RoHS  

¥64,000

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US
RoHS  

¥60,000

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RoHS  

¥128,000

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US
RoHS  

¥123,000

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US
RoHS  

¥117,000

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US
RoHS  

¥111,000

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US
RoHS  

¥105,000

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US