Katsuhiro Ohtake

Title: Katsuhiro Ohtake and Camera Finder Innovations.

Introduction

Katsuhiro Ohtake is an inventor associated with Omiya, Japan, and Fuji Photo Optical Co., Ltd. His patent work includes camera finder components designed to improve the visibility and flexibility of information presented to photographers. Ohtake is credited with 6 patents.

Latest Patents

Ohtake’s listed patents include “Finder prism” and “Finder device,” both focused on camera viewfinder design.

“Finder prism” describes a resin prism positioned between a camera’s objective and ocular lenses. A shouldered portion on the prism helps form narrow in-finder markings, including an autofocus target mark and a short-distance correction mark, over the image being photographed.

“Finder device” describes a viewfinder with a switchable screen-format mask held by support pins and a pressure plate. Markings on the transparent mask or pressure plate appear alongside the viewed subject, while the design aims to reduce manufacturing expense and defects.

Career Highlights

Ohtake’s documented inventions address practical viewfinder features: clearly presenting photographic guides and allowing users to select among alternative screen formats. These designs reflect attention to both the photographer’s viewing experience and the construction of camera components.

Collaborations

Ohtake’s listed coworkers include Osamu Inaba and Masao Shoji. His company affiliation is Fuji Photo Optical Co., Ltd.

Conclusion

Katsuhiro Ohtake’s patents highlight camera-viewfinder innovations that combine useful photographic markings with adaptable, manufacturable optical components.