Defond Components Limited

Defond Electech Co., Ltd

Dongguan Yutong Optical Technology Co., Ltd.

Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Lei Zhang

Yun Zhang

Guo Zhu Zeng

Jian Hua Gong

Ding Wei Que

Jianwei He

Zhanjun Zhang

Shilong Mi

Danyi Wang

Ni Han

Chuangbiao Liu

Chen Yao

Provided a wide-angle lens includes: first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, and seventh lens arranged sequentially from object surface to image surface along optic axis; first lens and sixth lens are negative focal power lenses, third lens, fourth lens, fifth lens, and seventh lens are positive focal power lenses, and second lens is negative or positive focal power lens; focal lengths of first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, and the wide-angle lens are f1, f2, f3, f4, f5, f6, f7 and f respectively, satisfying: 0.3≤|f1/f|≤2.6, |f2/f|≥2, 2.3≤|f3/f|≤7.2, |f4/f|≥0.8, 0.67≤|f5/f|≤2.94, 0.32≤|f6/f|≤2.77, and |f7/f|≥0.16. The wide-angle lens can satisfy surveillance requirements of high definition and small distortion while ensuring low cost.

Wide-angle lens including seven lenses of −−+++−+ or −++++−+ refractive powers

Provided is an optical lens. The optical lens is provided with a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, which are sequentially arranged from an object side to an image side along an optical axis. The first lens is a spherical lens having a negative focal power, the second lens is an aspheric lens having a meniscus shape bent towards an image surface, the third lens is an aspheric lens having a meniscus shape bent towards an object surface, the fourth lens is an aspheric lens having a positive focal power, the fifth lens is an aspheric lens having a positive focal power, the sixth lens is an aspheric lens having a negative focal power, and the seventh lens is an aspheric lens having a positive focal power.

Optical lens

Touch LED component

A touch LED component and a touch device, and the touch LED component includes a metal cap, a touch button sheathed on an inner wall of the metal cap, and an LED lamp bead coupled to an inner wall of the touch button, a first through hole formed at the top of the metal cap, an induction pin installed at the bottom of the touch button, and an anode pin and a cathode pin installed on both sides of the bottom of the LED lamp bead respectively. The touch device includes a touch panel, a circuit board, and plural touch LED components. The touch LED component with high integration can be packaged by carrier tapes to facilitate automatic plug-ins and simplify production and assembling processes for mass production. The touch device has the features of simple structure, high reliability, good effect and long life.

Touch LED component and touch device

Growing community of inventors

Dongguan, China

Lei Zhang