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UDL/NUDL
Focal length f
Diameter φDc
Clear aperture φDe
Length L
Numerical aperture (NA)
Working distance (WD)
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These lenses contain elements which have different refractive indexes and produce a high degree of correction across a bandwidth of 200 - 400nm. They can be used as a laser focusing lens for broadband ultra-violet sources.

◦NA 0.1 or below (ETL model NA 0.25) can be focused to the diffraction limit.
◦ No adhesive or heat absorption materials are used to produce these lenses and they show high resistance to ultra-violet light.
◦These are not achromatic corrective but offers correction on spherical and comatic aberration.

Related product
Products
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.
▶We can provide catalog and custom lenses in large volume to your specifications.
▶For details on focal length of each wavelength, please see details on “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 3 to 4% of reflectivity per surface; therefore about 13% of loss is expected in transmission.

Common Specifications
MaterialSynthetic fused silica for Excimer Laser − Calcium fluoride (CaF2)
Material of frameAluminum (Finishing: Black anodized)
Design wavelength200nm, 308nm, 400nm
CoatingUncoated
Acceptance angle±1°
Outline Drawing

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Schematic

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Fixed holder (LHF-UDL) for UDL

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Reference Data
Spec
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Part Number
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    JP Yen Stock Qty
UDL-30-50P
UDL-30-80P
UDL-30-100P
NUDL-30-150P
NUDL-30-200P
UDL-40-80P
NUDL-40-100P
NUDL-40-150P
NUDL-40-200P
NUDL-40-250P
UDL-50-100P
NUDL-50-150P
NUDL-50-200P
NUDL-50-250P
NUDL-50-300P

50.4mm

34mm

27mm

17mm

0.27

39.3mm

80mm

34mm

27mm

14mm

0.17

72.4mm

100.1mm

34mm

27mm

13mm

0.14

92.5mm

151.5mm

34mm

27mm

16mm

0.09

137.1mm

200.3mm

34mm

27mm

16mm

0.07

185.2mm

80.3mm

44mm

37mm

17mm

0.23

70.1mm

100mm

44mm

37mm

18mm

0.19

87.7mm

149mm

44mm

37mm

18mm

0.12

134.4mm

201.2mm

44mm

37mm

18mm

0.09

185.5mm

249.7mm

44mm

37mm

19mm

0.07

230.7mm

100.8mm

54mm

47mm

20mm

0.24

89.1mm

149.7mm

54mm

47mm

21mm

0.16

136.3mm

200mm

54mm

47mm

22mm

0.12

179.9mm

252.4mm

54mm

47mm

21mm

0.09

233mm

300.9mm

54mm

47mm

22mm

0.08

278.8mm

RoHS  

¥120,000

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RoHS  

¥113,000

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US
RoHS  

¥105,000

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RoHS  

¥100,000

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US
RoHS  

¥98,000

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US
RoHS  

¥156,000

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US
RoHS  

¥143,000

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US
RoHS  

¥140,000

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US
RoHS  

¥137,000

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US
RoHS  

¥130,000

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US
RoHS  

¥192,000

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US
RoHS  

¥180,000

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US
RoHS  

¥174,000

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US
RoHS  

¥169,000

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US
RoHS  

¥166,000

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US