대칭성 공차를 갖는 교환렌즈용 줌 렌즈의 핀트 조정법과 통계적 해석
Focus Adjustment Method with Statistical Analysis for an Interchangeable Zoom Lens with Symmetric Error Factors
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초록
There are many types of interchangeable zoom lens in the digital single lens reflex camera and the compact digital still camera system in order to meet various specifications such as the field angle. Thus special cases for which the focus adjustment using only an auto‐focus group is not available in the focal point correction (that is, the focus adjustment) of both wide and tele‐zoom positions are sometimes generated. In order to make each BFL(back focal length, BFL) coincide at wide and tele‐zoom positions with each designed BFL, focus adjustment processes must be performed at least in these two points within the zoom lens system. In this paper, we propose a method of focus adjustment by using the concept of focus sensitivity, and we calculate a limit on focus adjustment distance by means of statistical analysis.
Abstract
There are many types of interchangeable zoom lens in the digital single lens reflex camera and the compact digital still camera system in order to meet various specifications such as the field angle. Thus special cases for which the focus adjustment using only an auto‐focus group is not available in the focal point correction (that is, the focus adjustment) of both wide and tele‐zoom positions are sometimes generated. In order to make each BFL(back focal length, BFL) coincide at wide and tele‐zoom positions with each designed BFL, focus adjustment processes must be performed at least in these two points within the zoom lens system. In this paper, we propose a method of focus adjustment by using the concept of focus sensitivity, and we calculate a limit on focus adjustment distance by means of statistical analysis.
참고문헌 (11)
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