Wenzhou University

Ningbo Sunny Opotech Co., Ltd.

Advanced New Technologies Co., Ltd.

Hui Li

Takehiko Tanaka

Pengjun Wang

Gang Li

Zhewen Mei

Le Song

Xilong Shao

Lei Wang

Hailong Liao

Hao Ye

Ziyu Zhou

Haipeng Pei

Chao Ye

Junjie Zhou

Xiaoming Ding

Ling Zhong

Ke Shi

Guangfu Zhou

Renkang Lin

An optical lens (), comprising a first lens () and a lens assembly (). The first lens () includes a first optical area () and a first structural area () surrounding the first optical area (), and the first structure area () includes a height measurement area () not coated with an anti-reflective coating. The lens assembly () includes a lens barrel () and at least one second lens () disposed in the lens barrel (). The at least one second lens () includes a second optical area () and a second structural area () surrounding the second optical area (). The first structural area () is connected to an end face () of the lens barrel () near the first lens () or the second structural area () of the second lens () closest to the first lens (). A manufacturing method of optical lens () and a camera module are also disclosed.

Optical lens, manufacturing method of optical lens, and camera module

A voltage mode weak-PUF circuit with rich challenge-response pairs comprises four decoders, two PUF arrays, a sequential control circuit and a voltage comparator. One-to-two PUF arrays are used to replace existing one-to-one PUF arrays to increase the number of challenge-response pairs by 2times, from 2realized by the one-to-one PUF arrays to 2×2, wherein N=a+b. Each PUF cell comprises m*n PUF cells and n transmission gates, and adopts a simple common-source amplifier structure formed by a first PMOS transistor, a first NMOS transistor and a second NMOS transistor, wherein any one PUF cell in one PUF array can be compared with any one PUF cell in the other PUF array to generate an output response. The number of output responses is 2, so the proportion of the PUF cells for generating one challenge-response pair is 2/2=1/2, and the reuse rate of the same PUF cell is merely 1/2.

Voltage mode weak-PUF circuit with rich challenge-response pairs

A PUF circuit based on the threshold loss of MOSFETs comprises N stages of delay units and an arbiter. Each stage of delay unit comprises six inverters and four MOS transistors, wherein the four MOS transistors are all PMOS transistors or NMOS transistors. Each path in each stage of delay unit uses only one PMOS or NMOS transistor and does not use a transmission gate formed by a PMOS transistor and an NMOS transistor. Therefore, it reduces hardware cost. Each MOS transistor on the transmission path has a threshold loss, PMOS and NMOS transistors in a third inverter and a sixth inverter are in an on-state, and output terminals of the third inverter and the sixth inverter will be charged to a high level or discharged to a low level, thus greatly increasing a delay difference between two square signals and enhancing randomness.

PUF circuit based on threshold loss of MOSFETs

A machine learning attack resistant strong PUF with a dual-edge sampling function comprises switch units, a first arbiter and a second arbiter. The first arbiter is for determining a sequential order of delays at a rising edge of signals input to a first input terminal and a second input terminal of the first arbiter. The second arbiter is for determining a sequential order of delays at a falling edge of signals input to a first input terminal and a second input terminal of the second arbiter. Each switch unit is composed of eight MOS transistors. The strong PUF has a high capacity to resist machine learning attacks and small hardware expenditure through simple structural design of the switch units, realizing machine learning attack resistance and small hardware expenditure at the same time, and generating a large number of challenge response pairs through dual-edge sampling realized by the two arbiters.

Machine learning attack resistant strong PUF with dual-edge sampling function

A method for assembling an optical lens includes preparing a first lenses part including a first lens and a second lenses part including a second lens, capturing the first lenses part, and adjusting a posture of the first lenses part according to a distance measurement result, so that an included angle between a first end surface of the first lenses part and a second end surface of the second lenses part is less than a threshold of inclination angle. The method also includes adjusting the first lenses part at degree of freedom of linear movement to complete pre-positioning, performing an active alignment of a position of the first lenses part at the degree of freedom of linear movement according to an actual imaging result, and fixing the first and second lenses parts together, so that their relative positions are maintained at the relative positions determined by the active alignment.

Optical lens, camera module and corresponding assembly method

Growing community of inventors

Zhejiang, China

Hui Li