Products Home / Optical Elements / Optical Mirrors / Concave Mirrors / Concave Mirrors: UV Broadband Dielectric Coating (350 - 400 nm)Concave Mirrors: UV Broadband Dielectric Coating (350 - 400 nm)
- Focal Lengths from 25 - 500 mm
- Ø1/2", Ø1", or Ø75 mm
- Dielectric Coating for 350 - 400 nm
- No Chromatic Aberration Introduced
CM127-025-E01
(Ø1/2")
CM254-050-E01
(Ø1")
Focus Polychromatic Beams without Chromatic Aberration
CM750-150-E01
(Ø75 mm)
Please Wait
| Common Specifications | |
|---|---|
| Available Diameters | Ø1/2", Ø1", and Ø75 mm |
| Dielectric Coating Range | 350 - 400 nm; Ravg >99% |
| Clear Aperture | >90% of Diameter |
| Surface Irregularity | λ/4 @ 633 nm |
| Surface Quality | 20-10 Scratch-Dig |
| Diameter Tolerance | +0.0/-0.2 mm |
| Thickness Tolerance | ±0.2 mm |
| Substrate | N-BK7a |
| Backside Surface | Fine Ground and Engraved with Part Number (Not Polished) |
| Dielectric Concave Mirrors Selection Guide | |||
|---|---|---|---|
| UV | 350 - 400 nm | ||
| Visible | 400 - 750 nm | 400 - 750 nm, Back Side Polished | |
| NIR | 750 - 1100 nm | 750 - 1100 nm, Back Side Polished | |
| Telecom | 1280 - 1600 nm | ||
See the Concave Mirror Guide tab, above, for our complete selection of concave mirrors.
Features
- Dielectric Coating: 350 - 400 nm (-E01)
- >99% Average Reflectivity in Dielectric Coating Range
- Three Diameter Options: 1/2", 1", or 75 mm
- Focal Lengths Range from 25 mm - 500 mm
Thorlabs' Broadband Dielectric Concave Mirrors are designed for light collection, imaging, and focusing applications. These reflective optics focus light without introducing chromatic aberration, making them especially suitable for broadband sources.
All of the mirrors on this page can be mounted by our Precision Kinematic Mirror Mounts.
Thorlabs also offers metallic concave mirrors that operate over a broader wavelength range at the expense of lower reflectivity. Please contact Tech Support for custom versions of these optics.
These plots show the reflectivity of our -E01 dielectric coating for a typical coating run. The shaded region in each graph denotes the spectral range over which the coating is highly reflective. Due to variations in each run, this recommended spectral range is narrower than the actual range over which the optic will be highly reflective. If you have any concerns about the interpretation of this data, please contact Tech Support. For applications that require a mirror that bridges the spectral range between two dielectric coatings, please consider a metallic concave mirror.
| Posted Comments: | |
tcohen
(posted 2012-04-05 15:30:00.0) Update from Tim at Thorlabs: These have fine ground backs and as such will be unusable for your application. However, we are able to offer a custom with a polished backside. I have contacted you with more information. tcohen
(posted 2012-04-05 15:06:00.0) Response from Tim at Thorlabs: Thank you for your feedback. I am looking into the reflection/transmission of these mirrors when incident light is on the uncoated side and I will update you with the information soon! junge
(posted 2012-04-05 06:19:36.0) Hello,
is the backsurface of the mirror transparent so that it can be used to set up a FPI?
Thanks a lot,
Christian |
| Concave Mirrors Options | |
|---|---|
| Mirror Type | High-Reflectance Coating Wavelength |
| UV Enhanced Aluminum | 250 - 450 nm |
| Aluminum | 450 nm - 20 µm |
| Silver | 450 nm - 20 µm |
| Gold | 800 nm - 20 µm |
| E01 Dielectric | 350 - 400 nm |
| E02 Dielectric | 400 - 750 nm |
| E02 Dielectric, Back Side Polished | |
| E03 Dielectric | 750 - 1100 nm |
| E03 Dielectric, Back Side Polished | |
| E04 Dielectric | 1280 - 1600 nm |
| Crystalline | 1064 or 1550 nm |
Concave Mirror Selection Guide
Thorlabs offers concave mirrors with both metallic and dielectric stack reflective coatings. Metallic-coated mirrors offer relatively high reflectivity (90-95%) over a wide wavelength range, while dielectric-coated mirrors provide even higher reflectivity (>99%) but over a smaller wavelength range. See the table to the right for an overview of the various coatings we offer for our concave mirrors. All coating options are available on optics with diameters ranging from Ø1/2" to Ø75 mm. Metallic mirrors are available with focal lengths from 9.5 - 1000 mm, while dielectric mirrors are available with focal lengths from 12 - 1000 mm.
Below are reflectivity plots for our metallic- and dielectric-coated concave mirrors. To view our selection of mirrors available with a particular coating, either click on the graphed line of interest or the corresponding coating name in the legend. Graphs are shown for an angle of incidence (AOI) of 8 degrees, which is the recommended angle at which to use a concave mirror.
Click on a particular graphed line or the corresponding name in the legend to view concave mirrors with that coating option.
| Item # | Focal Length | Center Thickness | Edge Thickness | Radius of Curvature | Reference Drawing |
|---|---|---|---|---|---|
| CM254-025-E01 | 25 mm | 6.0 mm | 7.6 mm | 50.0 mm (1.97") |  |
| CM254-050-E01 | 50 mm | 6.8 mm | 100.0 mm (3.94") | ||
| CM254-075-E01 | 75 mm | 6.5 mm | 150.0 mm (5.91") | ||
| CM254-100-E01 | 100 mm | 6.4 mm | 200.0 mm (7.87") |
UV Dielectric Concave Mirrors