1.浙江舜宇光学有限公司,浙江 宁波 315400
2.宁波职业技术大学,浙江 宁波 315800
张变(1991— ),女,工程师,从事光学系统设计研究。1520635881@qq.com
收稿:2026-01-21,
修回:2026-04-21,
纸质出版:2026-05-20
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张变,杨俊成,贺凌波.手机潜望长焦系统的可靠性优化设计[J].光学技术,2026,52(03):324-331.
ZHANG Bian,YANG Juncheng,HE Lingbo.Reliability optimization design of periscope telephoto lens[J].OPTICAL TECHNIQUE,2026,52(03):324-331.
为适应手机轻薄化趋势,潜望式长焦系统普遍采用D-cut(边缘切割)结构设计。然而,此类镜头在高温高湿环境下常出现中心像散显著漂移的问题。文章结合理论分析与实验验证,揭示了该现象产生的机理:D-cut结构的非对称性导致镜片在环境应力下长轴与短轴方向的面型变形不一致,从而诱发了面型误差中的彗差分量,最终导致中心像散变化。为此,文章建立了边缘切割保留率与面型变化量的关系模型,明确了可靠性优化的方向,通过减少系统内D-cut镜片的数量,有效改善了可靠性下降的问题。文章设计完成了一款F数为2.48、焦距为15.5mm、光学总长为14.7mm、光学畸变小于2%、相对照度大于36.2%的潜望长焦系统。评价结果显示,该系统在无限远对焦模式下,0.9视场内1/4奈奎斯特频率处的MTF值均大于0.6;在300mm微距模式下,0.9视场内1/4奈奎斯特频率处的MTF值均大于0.53,表明该系统像质优良。
To accommodate the trend towards slimmer mobile devices
periscope telephoto systems widely employ a D-cut structure design. However
such lenses often face reliability challenges
particularly regarding environmental adaptability.Through theoretical analysis and experimental verification
the mechanism is revealed behind the surface deformation differences along the long and short axes caused by the asymmetry of the D-cut structure under high temperature and humidity.This deformation introduces a coma component in the surface form error
thereby affecting the central astigmatism of the system.A relationship model between the edge cutting retention ratio and surface deformation is established
providing a clear direction for reliability optimization.By reducing the number of D-cut lenses
the reliability under environmental stress is effectively improved
and the design is comprehensively optimized in terms of macro performance.A telephoto system is achieved with an F-number of 2.48
a focal length of 15.5 mm
a total track length (TTL) of 14.7 mm
optical distortion within 2%
and relative illumination greater than 36.2%.At infinity
the MTF values within 0.9 field of view at 1/4 of the Nyquist frequency are greater than 0.6;at the macro distance of 300 mm
the MTF values under the same conditions are greater than 0.53
the imaging quality of the system is excellent.
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