Location History:
- Suwon, KR (2000)
- Seongnam-si, KR (2008 - 2011)
Company Filing History:
4 out of 131,744 
1 out of 7,603 Years Active: 2000-2011
Title: Hag-hyeon Jang: Innovator in Optical Pickup Technology
Introduction
Hag-hyeon Jang is a notable inventor based in Seongnam-si, South Korea. He has made significant contributions to the field of optical pickup devices, holding a total of 4 patents. His work focuses on enhancing the performance and compatibility of optical devices used in various media.
Latest Patents
One of his latest patents is an optical pickup device that includes a light source for projecting a beam of light to record and reproduce information on an optical recording medium. This device features a collimating lens that converges and converts the light into a parallel beam. An object lens then condenses this beam and projects it onto the recording medium. The design incorporates an optical element between the collimating lens and the object lens, along with a first actuator that adjusts the collimating lens along the optical axis to minimize aberration. This innovation effectively improves the recording and reproducing performance of the optical pickup device.
Another significant patent by Jang is an optical pickup compatible with multiple types of media. This invention utilizes several light sources emitting different wavelengths, with light path changers directing the light to an objective lens. The objective lens focuses the light onto the recording medium, while a movable collimating lens corrects spherical aberration. Additionally, a diffractive optical element is included to address chromatic aberration, enhancing the versatility of the optical pickup.
Career Highlights
Hag-hyeon Jang has worked with prominent companies in the technology sector, including Samsung Electronics Co., Ltd. and Samsung Electro-Mechanics Co., Ltd. His experience in these organizations has contributed to his expertise in optical technologies and innovations.
Collaborations
Throughout his career, Jang has collaborated with talented individuals such as Soo-han Park and Jang-hoon Yoo. These partnerships have likely fostered a creative environment that has led to the development of groundbreaking technologies in the optical field.
Conclusion
Hag-hyeon Jang is a distinguished inventor whose work in optical pickup technology has made a significant impact on the industry. His innovative patents demonstrate a commitment to improving the performance and compatibility of optical devices.