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논문 기본 정보

자료유형
학술저널
저자정보
Dohwan Jeong (Kongju National University) Jun Ho Lee (Kongju National University) Ho Jeong (LIG Nex1) Chang Min Ok (LIG Nex1) Hyun-Woo Park (LIG Nex1)
저널정보
한국광학회 Current Optics and Photonics Current Optics and Photonics Vol.2 No.3
발행연도
2018.6
수록면
241 - 249 (9page)

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초록· 키워드

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We report a midinfrared dual-field-of-view (FOV) optical system design for an airborne electro-optical targeting system. To achieve miniaturization and weight reduction of the system, it has a common aperture and fore-optics for three different spectral wavelength bands: an electro-optic (EO) band (0.6~0.9 μm), a midinfrared (IR) band (3.6~4.9 μm), and a designation laser wavelength (1.064 μm). It is free to steer the line of sight by rotating the pitch and roll axes. Our design co-aligns the roll axis, and the line of sight therefore has a fixed entrance pupil position for all optical paths, unlike previously reported dual-FOV designs, which dispenses with image coregistration that is otherwise required. The fore-optics is essentially an achromatized, collimated beam reducer for all bands. Following the fore-optics, the bands are split into the dual-FOV IR path and the EO/laser path by a beam splitter. The subsequent dual-FOV IR path design consists of a zoom lens group and a relay lens group. The IR path with the fore-optics provides two stepwise FOVs (1.50° × 1.20° to 5.40° × 4.32°), due to the insertion of two Si lenses into the zoom lens group. The IR optical system is designed in such a way that the location and f-number (f/5.3) of the cold stop internally provided by the IR detector are maintained when changing the zoom. The design also satisfies several important performance requirements, including an on-axis modulation transfer function (MTF) that exceeds 10% at the Nyquist frequency of the IR detector pitch, with distortion of less than 2%.

목차

I. INTRODUCTION
II. SYSTEM DESIGN
III. DUAL-FOV IR OPTICS DESIGN
IV. CONCLUSION
REFERENCES

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