• Korean Journal of Optics and Photonics
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• v.34 no.4
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• pp.157-169
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• 2023

Augmented reality (AR) using a head mounted display (HMD) is used in various fields such as military, medicine, manufacturing, gaming, and education. In this paper, we discuss the design and fabrication of the AR optical system, which is most essential for HMD. The AR optical system for HMD requires a wide transparent area in which the augmented image of the display and the real world can be viewed at the same time. To this end, an AR optical system was designed and manufactured by dividing it into three parts according to each characteristic. Also, the refractive index of the ultra-violet (UV) adhesive layer required to make the three optical systems into one complete AR optical system was considered from the design stage to minimize the optical path shift phenomenon when the input light source passes through the UV adhesive layer. In addition, when designing the AR optical system, two aspheric surfaces were used to compensate for off-axis aberration and to be suitable for mass production. Finally, for HMD mass production, an aspheric AR optical system with a thickness of 11 mm, a diagonal field of view of 40°, and a weight of 11.3 g was designed and manufactured.

• The Optical Journal
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• v.11 no.5 s.63
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• pp.65-69
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• 1999

한국광학기기협회가 '한$\cdot$일 광학산업 기술협력 사업'의 일환으로 주관한 일본 히다카(日高)광학연구소 연수를 통해 Focult Test, Null Test, Ronchi Test 등 다양한 렌즈 검사 방법과 비구면 렌즈 가공방법을 실습과 이론을 겸해서 익혔다. 우리 나라도 렌즈 가공, 검사 방법 등에 대한 실무와 이론체계를 확실히 정립해야 할 때임을 절실히 느낄 수 있는 기회였다.

• The Optical Journal
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• s.88
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• pp.51-55
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• 2003

최근 몇 년간 중국의 광학 산업은 합작투자기업, 민간 기업, 정부 지원 투자 등의 형태로 놀라운 속도로 발전해 왔다. 본 고에서는 현재 중국의 광학 디자인 및 제조업 발전 현황을 살펴보고 현재 중국에서 일반적으로 사용되는 광학 디자인 소프트웨어 패키지와 이들의 특징을 요약하여 제시하였다. 또한 유리, 렌즈 요소 및 망원경, 현미경, 카메라 렌즈 등과 같은 상용화된 제품을 비롯한 다양한 부문에서 일반 기업들의 생산 규모의 사례를 제시하였다. 그리고 비구면

• Korean Journal of Optics and Photonics
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• v.19 no.6
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• pp.439-447
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• 2008

There is a need for a finite schematic presbyopic eye that models vision and image quality under various conditions such as cataract or refractive surgery, as well as near vision corrections with an ophthalmic lens or contact lens. Using recently measured biometric data of presbyopic eyes, new model eyes were designed that are optically and anatomically close to real eyes. The parameters changing significantly with age were incorporated into models for four different age groups. The new model eyes have alpha angle, decentered pupil, aspheric GRIN lens and aspheric retinal surface. It is likely that the new finite presbyopic model eyes will be useful for designing visual instruments such as low vision aids, PALs, IOL and contact lenses, and for the clinical prediction of the retinal image quality of a presbyopic patient.

• Proceedings of the Optical Society of Korea Conference
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• 2007.07a
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• pp.165-166
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• 2007

• Proceedings of the Optical Society of Korea Conference
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• 2007.07a
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• pp.205-206
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• 2007

• Proceedings of the Optical Society of Korea Conference
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• 2006.02a
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• pp.343-344
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• 2006

• Proceedings of the Optical Society of Korea Conference
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• 2008.02a
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• pp.137-138
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• 2008

• Proceedings of the Optical Society of Korea Conference
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• 2008.07a
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• pp.391-392
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• 2008

• Korean Journal of Optics and Photonics
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• v.32 no.6
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• pp.314-322
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• 2021

A reflecting telescope consists of a concave primary mirror and a convex secondary mirror. The primary mirror is easy to measure, because it converges the beam from an interferometer, while the secondary mirror diverges the beam and so is not easy to measure, even though it is smaller than the primary mirror. In addition, the Korsch-type telescope uses the central area of the secondary mirror, so that the entire area of the secondary mirror needs to be measured, which the classical Hindle test cannot do. In this paper, we propose a double-stitching method that combines two separate area measurements: the annular area, measured using the Hindle stitching method, and the central area, measured using a spherical wave from the interferometer. We test the surface error of a convex asphere that is 202 mm in diameter, with 499 mm for its radius of curvature and -4.613 for its conic constant. The surface error is calculated to be 19.5±1.3 nm rms, which is only 0.7 nm rms different from the commercial stitching interferometer, ASI. Also, the two results show a similar 45° astigmatism aberration. Therefore, our proposed method is found to be valuable for testing the whole area of a convex asphere.