Are the mounted aspheric lenses vacuum compatible and work at 60K?
YLohia
 (posted 2019-09-30 12:02:57.0)
Hello, thank you for contacting Thorlabs. In general, these mounted aspheres are not designed for vacuum compatibility and cryogenic use. We typically use NOA68 epoxy to mount the lenses to their mounts, which is not a vacuum-rated epoxy.
Can you provide the Zemax files for the 354430-B lens?
tfrisch
 (posted 2018-01-03 02:32:49.0)
Hello, thank you for contacting Thorlabs. I can work on getting the file for you, but until then, the aspheric coefficients are as follows. R=2.838589, K=-0.576643. The center thickness is 0.99mm. The diameter is 2.00mm. I will reach out to you directly as well.
Does the -B coating (600 - 1050 nm) stand a temperature of about 250 °C ?
If not, can you provide alternative AR coatings which stand this temperature?
besembeson
 (posted 2016-03-16 10:21:54.0)
Response from Bweh at Thorlabs USA: The typical operating temperatures should be under 200 deg C. We don't have any alternatives at this time for higher temperatures.
Hi! Is it possible to get the Sellmeier formula and coefficients for this lens?
Thanks! Richard
jlow
 (posted 2015-05-13 10:47:48.0)
Response from Jeremy at Thorlabs: The lens is made from ECO-550 glass. We can provide the refractive indices for the material at different wavelengths. I will contact you directly to provide this.
user
 (posted 2014-07-05 04:47:52.283)
A280-B Zemax file?
myanakas
 (posted 2014-07-11 03:27:08.0)
Response from Mike at Thorlabs: Based on this feedback, we are currently working to have Zemax files added to our website for all of our molded glass aspheres. In the meantime, since no contact information was provided, please contact techsupport@thorlabs.com for the A280-B Zemax file.
mchen
 (posted 2013-06-07 11:27:41.273)
Hi,
I want to mount an A230TM-B lens to 0.5" lens tube, but can not find an adapter. Can you please give a suggestion?
Thanks,
Mike
jlow
 (posted 2013-06-07 12:23:00.0)
Response from Jeremy at Thorlabs: The A230TM-B has M9x0.5 thread. The adapter to convert that to SM05 is the S05TM09, found at https://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=1749&pn=S05TM09.
dgardner
 (posted 2012-10-01 15:34:00.0)
A response from Dave at Thorlabs: Thank you for your feedback. The lenses sold on this page are coated for either 600 - 1050 nm or 650 - 1050 nm. We have updated the specs tables to include the correct AR coating range for each individual lens.
user
 (posted 2012-10-01 15:40:57.0)
Confusion! 600nm- or 650nm- starting wavelength of AR coating????
jlow
 (posted 2012-07-31 14:03:00.0)
A response from Jeremy at Thorlabs: Thank you for your feedback. The reason the M12 threading is used is because of the size of the unmounted lens, which is about 9.94mm in diameter. With regard to adapters, we only have adapters to SM1 or RMS threading. The reason we do not have an M12 adapter for SM05 is because the wall of the adapter would then be too thin. I will contact you directly with regard to other alternative.
paul.lauria
 (posted 2012-07-30 19:32:07.0)
I should say, your *half-inch* lens tubes don't have an adapter for the M12x0.5. Why...? We're kind of tight on space is why I ask.
paul.lauria
 (posted 2012-07-30 19:23:22.0)
Your lens tubes don't have adapters for M12 x 0.5 threads, so why bother using this thread for your EFL=8mm lens'? is there some alternative? I'd like to use one of the M8 and M12 lens on this page in a tube. (specifically, C240TME-B and C390TME-B)
jlow
 (posted 2012-07-30 13:20:00.0)
Response from Jeremy at Thorlabs. The drop in refractive index is a result of the molding process used in making these molded aspheres. The aspheres are molded above the glass transition temperature and cooled rapidly. This results in a small amount of residual stress, which translates into a small index drop. This data can be found in the Zemax catalogs.
clarafly
 (posted 2012-07-28 03:21:47.0)
The index of H-LAK54 at 655 nm is 1.724 in the autocad pdf of A390-B, but http://refractiveindex.info/?group=CDGM&material=H-LAK54 and CDGM's database both give 1.72975 at 655 nm, why the difference? Can you provide your version of dispersion formula?
bdada
 (posted 2012-02-24 15:07:00.0)
Response from Buki at Thorlabs to acable:
Thank you for your feedback. The variable holds the units but the coefficients are unitless. We are currently looking into how best to unify the information in one document.
bdada
 (posted 2012-01-23 08:50:00.0)
Response from Buki at Thorlabs:
Thank you for your feedback. The housings of our mounted aspheric lenses are made from 303 stainless steel, which should be non magnetic. We can provide custom aluminum housings and have contacted you to get more information.
p.nowik
 (posted 2012-01-19 11:06:41.0)
Is there a possibility to get the lenses mounted in non magnetic materials, for example aluminium?
acable
 (posted 2012-01-13 18:47:21.0)
Do the aspheric coeficients have units, seem to be missing from your drawings.
It would be nice if the pdf "Spot Diagrams for Laser Quality Molded Glass Aspheric Lens 352230" had the drawing embedded in it so we don't have to open multiple documents.
AR Coating Abbreviations
Abbreviation
Description
U
Uncoated: Optics do not have an AR Coating of any kind
A
Broadband AR Coating for the 350 - 700 nm or 400 - 600 nm range
B
Broadband AR Coating for the 600 - 1050 nm or 650 - 1050 nm range
C
Broadband AR Coating for the 1050 - 1620 nm or 1050 - 1700 nm range
V
Narrowband AR Coating designed for the wavelength listed in the table below