Hon Hai Precision Industry Co., Ltd.

Tsinghua University

Wei-Chen Wu

Shou-Shan Fan

Jun Zhu

Guo-Fan Jin

Rui-rui Tang

The present application relates to an off-axis two-mirror infrared imaging system including a primary reflecting mirror and a secondary reflecting mirror. The primary reflecting mirror is located on the incident light path of an incident infrared light beam and reflects the incident infrared light beam to form a first reflected light beam. The secondary reflecting mirror is located on the reflection light path of the primary reflecting mirror, and is used to reflect the first reflected light beam to form a second reflected light beam. The second reflected light beam reaches an image surface after passing through the incident infrared light beam. The reflective surfaces of the primary reflecting mirror and the secondary reflecting mirror are freeform surfaces. The secondary reflecting mirror and the image plane are respectively located on both sides of the incident infrared light beam.

Off-axis two-mirror infrared imaging system

A freeform surface off-axial three-mirror imaging system is provided. The freeform surface off-axial three-mirror imaging system comprises a primary mirror, a secondary mirror, and a compensating mirror. The primary mirror, the secondary mirror, and the compensating mirror are located adjacent and spaced away from each other. A surface shape of each of the primary mirror and the secondary mirror is a quadric surface. The primary mirror is used as an aperture stop. A surface shape of the compensating mirror is a freeform surface. A light emitted from a light source is reflected by the primary mirror, the secondary mirror, and the compensating mirror to form an image on an image plane.

Freeform surface off-axial three-mirror imaging system

A freeform surface optical telescope imaging system is provided. The freeform surface optical telescope imaging system comprises a primary mirror, a secondary mirror, a compensating mirror, and a spherical mirror. The primary mirror, the secondary mirror, the compensating mirror, and the spherical mirror are spaced from each other. A surface shape of each of the primary mirror and the secondary mirror is a quadric surface. The primary mirror is used as an aperture stop. A surface shape of the compensating mirror is a freeform surface. A surface shape of the spherical mirror is a spherical surface. A light emitted from a light source would be reflected by the primary mirror, the secondary mirror, the compensating mirror, and the spherical mirror to form an image on an image plane.

Freeform surface optical telescope imaging system

The present invention relates to a freeform surface reflective infrared imaging system comprising a primary mirror, a secondary mirror, a tertiary mirror, and an infrared light detector. Each reflective surface of the primary mirror, the secondary mirror, and the tertiary mirror is an xy polynomial freeform surface. A field of view of the freeform surface reflective infrared imaging system is larger than or equal to 40&#xb0;&#xd7;30&#xb0;. An F-number of the freeform surface reflective infrared imaging system is less than or equal to 1.39.

Freeform surface reflective infrared imaging system

The present invention relates to a method for designing a freeform surface reflective imaging system, comprising: selecting an initial system, wherein an FOV of the initial system is X&#xd7;Y; selecting an FOV sequence as [X, Y], [X, Y], [X, Y], . . . , [X, Y], while the FOV of the system to be designed is X&#xd7;Y, and X&#x3c;X&#x3c;X&#x3c; . . . &#x3c;X, Y&#x3c;Y&#x3c;Y&#x3c; . . . &#x3c;Y; using point-by-point methods to construct all freeform surfaces of the initial system in the FOV of X&#xd7;Y; setting the system obtained in the last step as a second initial system for system construction in the FOV of X&#xd7;Y; repeating the last step to execute system construction in the order of the FOV sequence until the final FOV X&#xd7;Yis obtained.

Growing community of inventors

Beijing, China

Wei-Chen Wu