• Title/Summary/Keyword: 분광투과율

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The Optical Properties of SiO2/TiO2/ZrO2 Broadband Anti-reflective Multi-layer Thin Films Prepared by RF-Magnetron Sputtering (SiO2/TiO2/ZrO2 광대역 반사방지막의 제작 및 광학적 특성 분석)

  • Kang, M.I.;Ryu, J.W.;Kim, K.W.;Kim, C.H.;Baek, Y.K.;Lee, D.H.;Lee, S.R.
    • Journal of the Korean Vacuum Society
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    • v.17 no.2
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    • pp.138-147
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    • 2008
  • $SiO_2/TiO_2/ZrO_2$ broadband anti-reflective multi-layer thin films were prepared at room temperature by RF sputtering system. Optical constants and structural properties on each layer of films were analyzed by spectroscopic ellipsometer and transmittance spectra of the films were measured by $UV-V_{is}$ spectrophotometer in the range of 300$\sim$900 nm. To evaluate the films, we compared the measured and analyzed spectra with designed spectra. We investigated influence of discrepancy of thickness and refractive indices of each layer on changes of the transmittance spectra. It was found that refractive indices and shape of dispersion of deposition materials are more contributed to changes of the transmittance spectra than thickness of layer.

Determination of optical constants and thickness of organic electroluminescence thin films using variable angle spectroscopic ellipsometry (가변입사각 분광타원 법을 이용한 유기 발광 박막의 광학상수 및 두께 결정)

  • 김상열;류장위;김동현;정혜인
    • Korean Journal of Optics and Photonics
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    • v.12 no.6
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    • pp.472-478
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    • 2001
  • We determined the optical constants and thickness of organic electroluminescence thin films using variable angle spectroscopic ellipsometry. Using the measured transmittance spectra and the spectroscopic ellipsomeoy data of the organic films on glass substrates in the optically transparent region, we determined the effective thickness and the refractive indices of organic thin films. Then by applying a numerical inversion method to variable angle spectro-ellipsometry data, we determined the complex refractive index at each wavelength including the optically absorbing region, as well as the thickness and surface micro-roughness of the organic thin films. The calculated transmittance spectra showed a tight agreement with the measured ones, confining the validity of the present model analysis.

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Transmissivity property of condition of melting temperature and added quantity of copper of phosphate glass for ir filter (Ir-filter용 인산계 유리의 용융조건과 Cu 첨가량에 따른 투과율 특성)

  • Kim, Seong-Il;Hwang, Jong-Hee;Lim, Tae-Young;Kim, Jin-Ho;Choi, Duck-Kyun
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2009.06a
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    • pp.337-337
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    • 2009
  • 가시광선영역에서 매우 균일한 높은 투과성뿐만 아니라 근적외선영역에서 가파른 홉수성 엣지와 함께 낮은 투과율을 제공하는 산화구리(II)를 함유하는 포스페이트 유리는 컬러 비디오 카메라의 컬러 보정 필터, 발광 컬러 디스플레이용 보호판(sheild), 모노크로메이터의 미광 필터, 플라스틱 복합재 필터의 무기 성분 및 CCD(전하 결합 소자) 및 CMOS(상보성 금속 산화물 반도체) 카메라 및 검출기 분야용 필터 유리로서 사용된다. 용융온도 및 산화구리(II) 첨가량에 따른 투과율을 측정하기 위해 포스페이트 유리 시료를 $1100\sim1500^{\circ}C$ 용융한 후 $400^{\circ}C$에서 2시간 동안 어닐링 공정을 거쳐 제조하였다. 제조된 시료는 두께 0.3mm로 폴리싱하여 자외선-적외선 분광 광도기를 이용하여 광학적 특성을 측정하였다. 본 실험을 통하여 용융온도에 따라 가시광선영역 및 근적외선영역에서의 투과율 거동을 비교한 결과 $1100\sim1200^{\circ}C$에서의 우수한 투과율 특성을 나타냈다. 용융온도가 내려감에 따른 가시광선영역 (400~600nm)에서 높은 투과율 및 근적외선영역 (750~1100nm)에서 낮은 투과율과 가파른 흡수성 엣지를 나타냈다.

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Coating and Characterization of Al2O3-CoO Thin Films by the sol-gel Process (졸-겔법을 이용한 Al2O3-CoO계 박막의 제조와 특성에 관한 연구)

  • Shim, Moonsik;Lim, Yongmu
    • Journal of Korean Ophthalmic Optics Society
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    • v.4 no.2
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    • pp.123-128
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    • 1999
  • This paper reports the preparation and characterization of colored coatings of $Al_2O_3$-CoO. Films of 25mol% CoO doped $Al_2O_3$, have been prepared on soda-lime-silica slide glasses by the sol-gel process from Al-alkoxide and Co-nitrate. The films have been characterized by a photospectroscopy and hardness tester. The color, spectral reflectance and spectral transmittance of the films was expressed in Lab color chart and on spectra plot. Microhardness of the films increased with increasing of the heating temperature. Transmittance and reflectance of the films decreased with increase of the heating temperature and coating times. The coating films showed various light-yellow, deep-yellow, greenish-yellow color as a function of the coating times and heating temperature.

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Influence of Artificial Tear Containing Carboxymethyl Cellulose Component on Physical Properties of Hydrogel Contact lens (카르복시메칠 셀룰로오스 성분이 포함된 인공누액이 하이드로젤 콘택트렌즈의 물성에 미치는 영향)

  • Cho, Seon-Ahr;Sung, A-Young
    • Journal of Korean Ophthalmic Optics Society
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    • v.18 no.4
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    • pp.457-463
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    • 2013
  • To determine the impact of artificial tears which include carboxymethyl cellulose on a hydrogel contact lenses. Methods: A contact lenses made of the cross-linking agent, EGDMA (ethylene glycol dimethacrylate) and HEMA (2-hydroxyethyl methacrylate) and with added NVP (n-vinyl-2-pyrrolidone) and MMA (methyl methacrylate) was evaluated for water content, refractive index, spectral transmittance and contact angle of produced contact lens. Results: The physical properties of the sampled copolymerized polymers showed that water content, refractive index, visible ray transmittance and contact angle were in the range of 26.61%~48.58%, 1.422~1.455, 80.8%~91.4% and $33.93^{\circ}{\sim}65.70^{\circ}$, respectively. In addition, after soaking with artificial tears, the water content, refractive index and contact angle were in the range of 24.46%~48.25%, 1.422~1.457, 77.0%~91.0% and $37.25^{\circ}{\sim}77.33^{\circ}$, respectively. The changes of the physical property depending on hydration time and showed an increase of refractive index and contact angle, decrease of water content and visible ray transmittance. Conclusions: Artificial tears which include carboxymethyl cellulose sodium which is used as a wetting agent influenced water content, refractive index, contact angle and spectral transmittance of a hydrogel contact lenses.

Evaluation of Blue-light Blocking Ratio and Luminous Transmittance of Blue-light Blocking Lens based on International Standard (국제표준에 의거한 청색광차단렌즈의 청색광차단율 및 시감투과율 평가)

  • Kim, Chang-Jin;Choi, Sung Wook;Yang, Seok Jun;Oh, Sang-Young;Choi, Eun Jung
    • Journal of Korean Ophthalmic Optics Society
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    • v.19 no.2
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    • pp.135-143
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    • 2014
  • Purpose: To evaluate the blue-light blocking ratio and luminous transmittance of blue-light blocking lenses using the blue-light hazard function as specified in international standard. Methods: In order to calculate the blue-light blocking ratio and luminous transmittance for a total of 41 blue-light blocking lenses from 8 manufacturers, UV-Vis spectrophotometer was used for measuring the spectral transmittance of wavelengths from 380 to 780 nm. Blue-light blocking ratio was calculated using blue-light hazard function as specified in ANSI Z80.3:2010 and ISO 13666(or Korean Standard KS B ISO 13666:2004). Results: The range of the blue-light blocking ratio was from 9.3 to 96.8%, the range of the transmittance from 53.5 to 92.7%, and the range of the luminous transmittance from 58.0% to 98.1%. In general the blue-light blocking lens prepared by coating tended to have a higher luminous transmittance, while those prepared by tinting a higher blue-light blocking ratio. Conclusions: The behavior of the spectral distribution of lenses showed the possibility of the performance improvement in the blue-light blocking lenses. Manufactures need to acquire their own technology that can evaluate the performance of blue-light blocking lens based in international standard.

Characterization of Hydrogel Tinted Contact Lens Containing 4-iodoaniline using Titanium Silicon Oxide Nanoparticles as Additive (티타늄 실리콘 옥사이드 나노입자를 첨가제로 사용한 4-iodoaniline을 포함한 하이드로젤 착색 콘택트렌즈의 특성)

  • Cho, Seon-Ahr;Sung, A-Young
    • Journal of Korean Ophthalmic Optics Society
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    • v.19 no.3
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    • pp.315-322
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    • 2014
  • Purpose: The physical and optical characteristics of hydrophilic tinted contact lens containing titanium silicon oxide nanoparticles and the basic hydrogel contact lens material containing 4-iodoaniline were examined. In this study, the utility of titanium silicon oxide nanoparticles as a UV-blocking material for ophthalmologic devices were investigated by measuring the UV transmittance of the produced polymer. Also, titanium silicon oxide nanoparticles only without the addition of 4-iodoaniline in primary contact lens materials by copolymerizing two groups were compared. Methods: For manufacturing hydrogel lens, HEMA, MA, MMA, 4-iodoaniline and a cross-linker EGDMA were copolymerized in the presence of AIBN as an initiator. Also, the titanium silicon oxide nanoparticles was used as additive. After polymerization the physical properties such as water content, refractive index, contact angle and spectral transmittance of produced contact lenses were measured. Results: Measurement of the physical properties of the copolymerized material showed that the water content, refractive index, UV-B transmittance and contact angle were in the range of 35.01~38.60%, 1.4350~1.4418, $34.15{\sim}57.25^{\circ}$ and 1.0~10.0%, respectively. Titanium silicon oxide nanoparticles is not used as an additive in the experimental group, the results of the measurement showed that the water content, refractive index, contan angle and UV-B transmittance of the hydrogel lens polymer was 34.00~36.80%, 1.4378~1.4420, $40.15{\sim}60.16^{\circ}$ and 1.8~25.0%, respectively. Conclusions: Also, the transmittance for UV light was reduced significantly in combinations containing titanium oxide nanoparticles.

Determination of optical constants for organic light emitting material of Alq3 using Forouhi-Bloomer dispersion relations (포로히-블루머(Forouhi-Bloomer) 분산식을 이용한 유기발광물질 Alq3의 광학 상수 결정)

  • 정부영;우석훈;이석목;황보창권
    • Korean Journal of Optics and Photonics
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    • v.14 no.1
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    • pp.1-7
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    • 2003
  • We determined the optical constants of organic light emitting material of Alq$_3$ in a spectral range between 1.5 and 6 eV using the physical model introduced by Forouhi and Bloomer[Phys. Rev. B 34, pp. 7018-7026, 1986.]. The initial parameters of $A_i,\;B_i,\;C_i$ of Forouhi-Bloomer dispersion relations were determined from the absorption peaks and widths of absorption spectra of the Alq$_3$ film. The refractive index of substrate, a fused silica, is derived from the Sellmeier equation with the measured transmittance and reflectance spectra. Then, the complex refractive index and thickness of the Alq$_3$ film were calculated by use of a nonlinear least square fitting program with the Forouhi-Bloomer dispersion relation and the measured transmittance and reflectance spectra.