This inventor holds 31 USPTO granted patents, primarily in Optical Pickup Apparatus. Top assignees: Sanyo Electric Co., Ltd., Sanyo Optec Design Co., Ltd., Kabushiki Kaisha Sankyo Seiki Seisakusho. Active years: 2002-2013.
Location History:
- Simosuwa-machi, JP (2002)
- Gunma, JP (2010)
- Ora-gun, JP (2009 - 2012)
- Nagano, JP (2003 - 2013)
- Okaya, JP (2012 - 2013)
Company Filing History:
27 out of 8,782 
24 out of 70 
1 out of 307 Years Active: 2002-2013
Areas of Expertise:
Title: Tohru Hotta: Innovator in Optical Technology
Introduction
Tohru Hotta, a prominent inventor based in Nagano, Japan, has made significant contributions to the field of optical technology, holding a remarkable total of 31 patents. His innovative work primarily focuses on enhancing optical pickup apparatuses and light-emitting devices, making strides in the functionality of various optical disc formats.
Latest Patents
Among his latest patents is the invention of a light-emitting device and an optical pickup apparatus, which addresses the challenges associated with the read/write characteristics of compact discs (CDs). In this invention, a third light-emitting source that emits a specific laser beam for CDs is strategically positioned along the optical axis of an objective lens, effectively minimizing coma aberration. This design not only enhances the image quality for CDs but also optimizes the laser beams emitted for DVDs and Blu-ray discs (BDs) by aligning their phase propagation directions. The accompanying optical pickup apparatus integrates a three-wavelength laser diode and multiple photodetectors to efficiently focus and read from optical discs, showcasing Hotta’s innovative approach to optical technology.
Career Highlights
Hotta's extensive career includes pivotal roles at well-known companies such as Sanyo Electric Co., Ltd. and Sanyo Optec Design Co., Ltd. His work at these organizations has paved the way for advancements in laser technology and optical systems, significantly impacting both entertainment and data storage industries.
Collaborations
Throughout his career, Hotta has collaborated with notable coworkers including Ryoichi Kawasaki and Ikuo Kasuga. These partnerships have fostered a creative environment leading to groundbreaking advancements in optical technologies.
Conclusion
Tohru Hotta's innovative spirit and expertise in optical technology, reflected in his 31 patents, continue to enhance the performance of optical devices. His work not only represents personal success but also contributes significantly to the broader field of optical engineering, paving the way for future advancements in this vital technology sector.