Dali Technology is applying for patents related to mid-wave zoom systems, with a compact mid-wave infrared zoom system compatible with F-numbers 4.0 and 5.5.

April 2 News, the information from the State Intellectual Property Office shows that Zhejiang Dali Technology Co., Ltd. has applied for a patent titled “A Compact Linear Mid-Wave Infrared Continuous Zoom Optical System.” The application publication number is CN121763541A, the application number is CN202411371721.3, the publication date is March 31, 2026, the filing date is September 29, 2024. The inventors are Li Xingzhao, Zhang Jiyou, Zi Chunyan, Shi Shanshan, Zhou Xiaoying, and Zhao Yigang. The patent agency is Beijing Tianda Intellectual Property Agency Co., Ltd., and the patent agent is Liu Fengyi. The classification numbers are G02B15/14 and G02B15/16.

The patent abstract shows that this invention relates to a compact linear mid-wave infrared continuous zoom optical system and belongs to the technical field of infrared continuous zoom optical lenses. It addresses the problems in the existing technology: cooling-type infrared continuous zoom optical systems are longer in length and larger in aperture, and at the same time they cannot be made compatible with F-numbers 4.0 and 5.5. The system includes, in sequence from the object side to the image side, a front fixed group, a zoom group, a compensation group, and a focusing group arranged coaxially. The front fixed group, in sequence from the object side to the image side, includes a first lens with positive optical power and a second lens with negative optical power. The zoom group includes a third lens with negative optical power. The compensation group, in sequence from the object side to the image side, includes a fourth lens with positive optical power and a fifth lens with negative optical power. The focusing group, in sequence from the object side to the image side, includes the sixth to eighth lenses, and the sixth to eighth lenses have negative, positive, and positive optical power in sequence. The system achieves compatibility with F-numbers 4.0 and 5.5.

*ST Dali was established on July 19, 2001, and listed on the Shenzhen Stock Exchange on February 18, 2008. Its registered and office address are both in Hangzhou, Zhejiang Province. The company is an important enterprise in China’s infrared thermal imager field and has certain technological barriers in infrared thermal imaging technology.

*ST Dali’s main business is the research, production, and sales of infrared thermal imager products. The Shenwan industry classification is Defense and Military Industry - Military Electronics II - Military Electronics III. It involves concept sectors such as delisting risk warnings, mid-cap, and the Internet of Things.

In 2025, *ST Dali’s operating revenue was 347 million yuan, ranking 10th among 11 companies in the industry. This is far lower than the industry leaders: AVIC Optoelectronics with 21.386 billion yuan and Aerospace Electronics with 5.82 billion yuan. The industry average is 4.035 billion yuan, and the median is 2.213 billion yuan. In terms of the composition of its main business, infrared and optoelectronic products generated revenue of 285 million yuan, accounting for 82.11%. In terms of net profit, 2025 was - 231 million yuan. It ranked 9th in the industry, far below the first-place AVIC Optoelectronics with 2.35 billion yuan and the second-place Hongming Electronics with 461 million yuan. The industry average net profit is 227 million yuan, and the median is 102 million yuan.

The recent patent information for Zhejiang Dali Technology Co., Ltd. is as follows:

Statement: The market has risks; investment requires caution. This article is automatically published by an AI large model based on third-party databases. It does not represent Sina Finance’s position. Any information appearing in this article is for reference only and does not constitute personal investment advice. If there are discrepancies, please refer to the actual announcements. If you have questions, please contact biz@staff.sina.com.cn.

A wealth of information and precise insights—available on the Sina Finance app

Responsible editor: Xiao Lang Express