Photochromic lens mirror-coated with Cr

Sungho Shin, Myeongkyu Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 languageEnglish
Pages (from-to)438-441
Number of pages4
JournalOptical Materials
Volume30
Issue number3
DOIs
Publication statusPublished - 2007 Nov

Fingerprint

Lenses
Antireflection coatings
Mirrors
lenses
mirrors
sunglasses
antireflection coatings
Evaporators
Buffer layers
evaporators
Thin films
sunlight
Coatings
transmittance
buffers
coatings
atmospheres
thin films

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

Shin, Sungho ; Lee, Myeongkyu. / Photochromic lens mirror-coated with Cr. In: Optical Materials. 2007 ; Vol. 30, No. 3. pp. 438-441.
@article{76d229b0ab094411ab9d93ac5c42ad65,
title = "Photochromic lens mirror-coated with Cr",
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.",
author = "Sungho Shin and Myeongkyu Lee",
year = "2007",
month = "11",
doi = "10.1016/j.optmat.2006.12.005",
language = "English",
volume = "30",
pages = "438--441",
journal = "Optical Materials",
issn = "0925-3467",
publisher = "Elsevier",
number = "3",

}

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 journalArticle

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 -