8 results about "Double reflection" patented technology

This invention discloses an SOA-DFB mutually coupled dual-feedback hybrid integrated chaotic semiconductor laser, relating to the field of semiconductor optoelectronic integration technology. The laser comprises a DFB laser chip, an SOA chip, a collimating lens, and a double-reflection transmission mirror arranged sequentially and coaxially. By adding an active device, the SOA chip, directly coupled to the DFB laser chip, the invention utilizes the broadband ASE noise generated by the SOA chip to inject backward into the DFB laser chip, causing disturbances to the optical field and intercarrier interactions within the laser. Simultaneously, combined with the strong-weak imbalance dual-cavity competition mechanism caused by the short and long external cavities formed by the front and rear reflecting surfaces of the double-reflection transmission mirror, the periodicity of a single feedback loop is effectively broken. This allows for the realization of high-bandwidth, low-delay, and high-power chaotic laser output without the need for complex optical injection systems and expensive optical isolators, offering advantages such as small size, low cost, high integration, and good stability.

The invention relates to different variants of reflectors (220), which alone or together with a light unit (210) also described form a space-saving high-luminosity system.

An integrated system applicable to multi-mode polarization interference grating exposure. The system comprises: a laser (1), a collimation and beam expansion system (2), a first polarization regulation and control unit (3), a second polarization regulation and control unit (4), a first variable aperture (5), a second variable aperture (6), a spatial light absorption plate (7), a first reflective optical module (8), a second reflective optical module (9) and a substrate (10). The system aims to realize a more compact, stable and easily adjustable high-precision exposure apparatus by simplifying an optical path structure, unifying an optical path length and introducing a spatially partitioned polarization modulation method. By no longer relying on traditional PBS beam-splitting structures, the system directly generates a required interference field by means of a single-beam expanded laser source, and uses a symmetric dual-reflection interference structure, thereby greatly enhancing the symmetry and stability of the system.

The application belongs to the technical field of tunable laser, and particularly relates to a frequency-sweeping laser light source based on double SOA and double mirrors and a cooperative working method. The application comprises a first semiconductor optical amplifier, a second semiconductor optical amplifier, a first mirror, a second mirror and a coupling / diffraction element, the first semiconductor optical amplifier and the second semiconductor optical amplifier are arranged on the two sides of the coupling / diffraction element, and the first mirror and the second mirror are arranged above the coupling / diffraction element; characterized in that the first semiconductor optical amplifier, the coupling / diffraction element and the first mirror constitute an outer cavity 1, and the second semiconductor optical amplifier, the coupling / diffraction element and the second mirror constitute an outer cavity 2. Through the mode of "non-overlapping area time-sharing work and overlapping area cooperative work", combined with double SOA mutual excitation and double outer cavity frequency selection, the application breaks through the gain bandwidth limitation of single SOA, ensures the frequency-sweeping without breakpoint and power stability, and realizes the wide-range, high-power and flatness frequency-sweeping laser output.

The application discloses a kind of based on time series convolution and attention mechanism Double-bounce non-line-of-sight target tracking method, step 1, the shadow image of double-bounce non-line-of-sight target is continuously collected using single light source projection system, obtain the time series of non-line-of-sight target shadow image;Step 2, the time series of shadow image obtained in step 1 is input into the time series convolutional neural network of single view input, and the target position is predicted;The time series convolutional neural network of single view input includes multi-stage convolution feature extraction module, local convolution correlation body alignment fusion module and convolution type time series hidden state update module;Step 3, output target position.The double-bounce non-line-of-sight target tracking method based on time series convolution and attention mechanism of the application does not depend on double-view input, and accurate tracking can be realized in low-texture, weak contrast scene only by single-view time image.

This invention discloses a wide-viewing-angle floating display device for automotive dashboards, comprising: an image source, a first reflector, and a second reflector. The first reflector is positioned on the side from which the light from the image source is emitted, and the second reflector is positioned on the side from which the light from the first reflector is emitted. A raw light beam emitted from the image source travels forward to the first reflector, where it is reflected again. The reflected beam then travels forward to the second reflector, where it is reflected once more, ultimately forming a real image visible to the human eye in the air. This invention utilizes a non-coaxial optical path design with dual reflectors and a freeform surface compensation technique. While maintaining system compactness, it overcomes the inherent contradiction between field of view and image quality in traditional reflective optical systems, enabling both the driver and passenger to see the same real image simultaneously, significantly expanding the field of view and enhancing the user experience.

The present invention discloses various variations of the reflector (220), which can be used alone or in conjunction with the light-emitting unit (210) of the present invention to form a space-saving and high-intensity lighting system.