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*Much like surface flatness for flat optics, spherical surface power is a measure of the deviation between the surface of the curved optic and a calibrated reference gauge, typically for a 633 nm source, unless otherwise stated. This specification is also commonly referred to as surface fit.
Features
6 Different Diameters Available: Ø5 mm, Ø6 mm, Ø1/2", Ø1", Ø2", and Ø75 mm
UV Grade Fused Silica
Wavelength Range 185 nm - 2.1 μm (uncoated)
Focal Lengths Available from 10.0 - 1000.0 mm
Surface Quality: 40-20 Scratch-Dig
Thorlabs' uncoated UV Grade Fused Silica Plano-Convex lenses are available in sizes ranging from Ø5 mm to Ø75 mm. UV-grade fused silica offers high transmission in the deep UV and exhibits virtually no laser-induced fluorescence (as measured at 193 nm), making it an ideal choice for applications from the UV to the near IR. In addition, UV fused silica has better homogeneity and a lower coefficient of thermal expansion than N-BK7.
Plano-convex lenses have positive focal lengths and are the most popular type of lens element. They are commonly used to focus a collimated incident beam; in such cases the collimated light source should be incident on the curved surface to minimize spherical aberrations. When image quality is not critical, plano-convex lenses can also be used as a substitute for achromatic doublets.
When deciding between a plano-convex lens and a bi-convex lens, both of which cause collimated incident light to converge, it is usually preferrable to choose a plano-convex lens if the desired absolute magnification is either less than 0.2 or greater than 5. Between these two values, bi-convex lenses are generally preferred.
These plano-convex lenses are compatible with a multitude of Thorlabs lens mounts. Please see the Mounting Options tab for details.
Below is the transmission curve for a 10 mm thick uncoated sample of UV fused silica when the incident light is normal to the surface. Please note that this is the measured transmission, including surface reflections.
Thorlabs offers a range of lens tube designs and lengths
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Posted Comments:
Poster: jlow
Posted Date: 2012-08-29 12:19:00.0
Response from Jeremy at Thorlabs: Thank you for your feedback on this. We can put different AR coatings on these lenses. I will contact you directly regarding a quote for this.
Poster: cherold
Posted Date: 2012-08-28 15:57:03.0
I would like to echo previous requests for other AR coatings on fused silica lenses. 532/1064 nm coatings would be particularly useful. Fused silica has a much lower thermal expansion coefficient (than other common glasses) making it a much better substrate for high power (10s of Watts, CW) optics.
Poster: tcohen
Posted Date: 2012-06-26 10:19:00.0
Response from Tim at Thorlabs: Thank you for your interest in our UVFS Lenses. Although we do not have tested LIDT data for our uncoated substrates, these have very high damage thresholds in comparison to coated or cemented substrates. There is a wealth of information online about LIDT on bulk substrate. As a reference, this paper http://www.precisionphotonics.com/vitem_axpd.asp?id=21&itemtype=Technicalpapers has useful information on damage thresholds. Damage thresholds depend on the optic (substrate, surface quality, any dust or dirt accumulation, coatings, cement) as well as the source (beam diameter, pulse duration, rep rate, intensity profile, wavelength). I will contact you to discuss your source and its suitability with our UVFS lenses.
Poster: sunil.phys
Posted Date: 2012-06-26 09:02:52.0
What is the damage threshold of UV fused silica used to make lenses in the family of LA4380 (uncoated)?
Poster: bdada
Posted Date: 2011-07-27 19:19:00.0
Response from Buki at Thorlabs:
Thank you for your feedback Pablo. The performance of the lens is lower than it should be. We have contacted you to initiate the return and replacement of the lenses.
Poster: moreno
Posted Date: 2011-07-26 07:47:50.0
Dear Sir/Madam,
I am Pablo Moreno, R&D Engineer at Synova S.A. Thorlabs is our first choice in a wide range of products.
We recently acquired a couple of lenses, the LA4184 and the 100 mm focal version. I observe that the transmission of these lenses is very low (ca. 70%). Is this normal? The lenses are UV coated.
To measure the transmission we use a 355nm UV laser, 700 mW, CW. It should be single mode, but I observe also a weak second mode.
It might have happened that I did not order the right lenses. It might be that it is normal to find this low transmission.
I thank you in advance for any information you could give me.
With my best regards,
Pablo
Poster: Mikhail.Levin
Posted Date: 2011-05-17 12:19:35.0
Do you have fused silica lenses with AR for 1064nm?
I am interesting lenses with fl~50 and D~25mm
thank you
Mikhail Levin
Poster: Adam
Posted Date: 2010-03-31 16:23:34.0
A response from Adam at Thorlabs to gudipati: We have experimental data down to 183nm that we can provide. Extrapolating the experimental data we have, it looks as if you would see zero percent transmission at 160nm. If you are interested, we can provide a free sample for testing.
Poster: gudipati
Posted Date: 2010-03-31 12:45:15.0
Hello,
could you send me spectral specification/graph of fused silica below 200 nm? Normally UV grade fused silica should transmit down to 160 nm. I would like to know whether your UV grade fused silica is has similar optical properties.
Regards
Murthy
Poster: Laurie
Posted Date: 2008-10-13 14:55:11.0
Response from Laurie at Thorlabs to krishe80: Thank you for your feedback. The surface flatness is ~lambda/2 on the spherical side and ~lambda/4 on the flat side. If you have further questions, please let us know.
Poster: krishe80
Posted Date: 2008-10-12 12:19:55.0
what is the surface accuracy on these lenses?
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