COLD MIRRORS

A Cold Mirror is the inverse of the Hot Mirror, it reflects the visible and transmits the infrared. Their coatings are all first-surface variety and like the hot mirrors, are also deposited onto low expansion material such as borosilicate glass. These mirrors are usually used at a 45° angle of incidence in randomly polarized light.

BENEFITS 
  • Transmit near-IR and reflect visible light
COMMON APPLICATIONS
  • Projection systems
  • Photocopiers
  • Surgical and dental lighting
  • Film and photographic apparatus
  • Illumination systems
  • Scientific instruments

Cold Mirror General Specifications

Thickness:  3.0mm ±0.5mm
Size Tolerance:  +0.0mm/-0.5mm
Min. Clear Aperture:  95% of outside dimension
Substrate Material:  Borosilicate glass
Flatness:  5–10 waves per 25mm
Parallelism:  3 arc minutes or better
Surface Quality:  80/50 per MIL-O-13830
Humidity and Abrasion:  Per MIL-C-675A
Max. Operating Temperature:  +200°C
Mechanical: Unmounted  

     

DESCRIPTION
PART NO.
1 - 5 pcs.
> 5 pcs.
QTY In Stock
Buy
Cold Mirror, 25mm diameter x 3mm thick
645FK84-25
$46.00
$44.00
4
Filter TypeCold Mirror
Transmission³85% average from 800 to 1200nm
Blocking
Size+0/-0.5mm
Thickness3.0 +0.5/-0.5 mm
Operating Temp. (°C.)+200 max.
CSV File (typical)N/A
QuantityPrice
1 - 5 pcs.$46.00
> 5 pcs.$44.00

Estimated Delivery: 2-3 Days
Cold Mirror, 50mm diameter x 3mm thick
645FK84-50
$67.00
$64.00
9
Filter TypeCold Mirror
Transmission³85% average from 800 to 1200nm
Blocking
Size+0/-0.5mm
Thickness3.0 +0.5/-0.5 mm
Operating Temp. (°C.)+200 max.
CSV File (typical)N/A
QuantityPrice
1 - 5 pcs.$67.00
> 5 pcs.$64.00

Estimated Delivery: 2-3 Days
Cold Mirror, 50mm x 50mm x 3mm thick
645FK84-50S
$78.00
$74.00
4
Filter TypeCold Mirror
Transmission³85% average from 800 to 1200nm
Blocking
Size+0/-0.5mm
Thickness3.0 +0.5/-0.5 mm
Operating Temp. (°C.)+200 max.
CSV File (typical)N/A
QuantityPrice
1 - 5 pcs.$78.00
> 5 pcs.$74.00

Estimated Delivery: 2-3 Days