Abstract
We have designed and fabricated mirror-coated photochromic lenses for use in sunglasses. These lenses consisted of a Cr thin film sandwiched between two SiO2 layers on the front surface and an anti-reflection (AR) coating on the backside. The SiO2 films above and below the Cr layer were introduced as the protection and buffer layers, respectively. The AR coating was to suppress back-reflection from the lens surface. Deposition of all coating layers were carried out by an e-beam evaporator under Ar atmosphere at P = 10-5 Torr and T = 70 °C. As expected, the overall transmittance decreased with increasing Cr thickness. For a Cr layer of 5 nm thickness, it changed from about 45% in the bleached state down to 25% after exposure to sunlight. This is consistent with the transmission range typically required for sunglasses.
| Original language | English |
|---|---|
| Pages (from-to) | 438-441 |
| Number of pages | 4 |
| Journal | Optical Materials |
| Volume | 30 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2007 Nov |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Computer Science(all)
- Atomic and Molecular Physics, and Optics
- Spectroscopy
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Electrical and Electronic Engineering
Cite this
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Photochromic lens mirror-coated with Cr. / Shin, Sungho; Lee, Myeongkyu.
In: Optical Materials, Vol. 30, No. 3, 11.2007, p. 438-441.Research output: Contribution to journal › Article
TY - JOUR
T1 - Photochromic lens mirror-coated with Cr
AU - Shin, Sungho
AU - Lee, Myeongkyu
PY - 2007/11
Y1 - 2007/11
N2 - We have designed and fabricated mirror-coated photochromic lenses for use in sunglasses. These lenses consisted of a Cr thin film sandwiched between two SiO2 layers on the front surface and an anti-reflection (AR) coating on the backside. The SiO2 films above and below the Cr layer were introduced as the protection and buffer layers, respectively. The AR coating was to suppress back-reflection from the lens surface. Deposition of all coating layers were carried out by an e-beam evaporator under Ar atmosphere at P = 10-5 Torr and T = 70 °C. As expected, the overall transmittance decreased with increasing Cr thickness. For a Cr layer of 5 nm thickness, it changed from about 45% in the bleached state down to 25% after exposure to sunlight. This is consistent with the transmission range typically required for sunglasses.
AB - We have designed and fabricated mirror-coated photochromic lenses for use in sunglasses. These lenses consisted of a Cr thin film sandwiched between two SiO2 layers on the front surface and an anti-reflection (AR) coating on the backside. The SiO2 films above and below the Cr layer were introduced as the protection and buffer layers, respectively. The AR coating was to suppress back-reflection from the lens surface. Deposition of all coating layers were carried out by an e-beam evaporator under Ar atmosphere at P = 10-5 Torr and T = 70 °C. As expected, the overall transmittance decreased with increasing Cr thickness. For a Cr layer of 5 nm thickness, it changed from about 45% in the bleached state down to 25% after exposure to sunlight. This is consistent with the transmission range typically required for sunglasses.
UR - http://www.scopus.com/inward/record.url?scp=34948831503&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34948831503&partnerID=8YFLogxK
U2 - 10.1016/j.optmat.2006.12.005
DO - 10.1016/j.optmat.2006.12.005
M3 - Article
AN - SCOPUS:34948831503
VL - 30
SP - 438
EP - 441
JO - Optical Materials
JF - Optical Materials
SN - 0925-3467
IS - 3
ER -