3results about How to "Improve optical resolution" patented technology

The invention relates to a light and miniature big-target-surface low-light lens, and the lens comprises a front lens group A, a diaphragm B and a rear lens group C, wherein the front lens group A, the diaphragm B and the rear lens group C are sequentially arranged in an incident direction of an optical path. The front lens group A includes a positive meniscus lens A1, a negative meniscus lens A2,a biconcave lens A3 and a biconvex lens A4, wherein the positive meniscus lens A1, the negative meniscus lens A2, the biconcave lens A3 and the biconvex lens A4 are sequentially arranged in an incident direction of the optical path. The biconcave lens A3 and the biconvex lens A4 are in close connection with each other as a first bonding group. The rear lens group C includes a biconcave lens C1, abiconvex lens C2, a biconvex lens C3, a plano-convex lens C4 and a negative meniscus lens C5, wherein the biconcave lens C1, the biconvex lens C2, the biconvex lens C3, the plano-convex lens C4 and the negative meniscus lens C5 are sequentially arranged in an incident direction of the optical path. The biconcave lens C1 and the biconvex lens C2 are in close connection with each other as a secondbonding group. The invention also relates to an imaging method of the lens. The lens is reasonable in design, effectively improves the imaging quality under the requirement of the large target surfaceof the lens, reduces the number of optical lenses, and realizes light and miniature lens. The lens has strong light collecting and light transmitting ability, and the target surface of the lens is large. The lens is high in optical resolution, is large in angle of view, and is large in observable range.

The present application relates to a kind of high-vacuum environment light mirror electron microscope correlation imaging system, including microscope main body, high-vacuum chamber, sample transmission rod and structured light illumination system. Wherein, microscope main body is provided with imaging system, high-vacuum chamber is located on microscope main body, upper light hole is equipped on the top cover of high-vacuum chamber, bottom is equipped with lower light hole, upper light hole and lower light hole are vertically aligned, and pass through each other. The objective lens of imaging system is located in high-vacuum chamber and is located between upper light hole and lower light hole. Frozen sample is arranged on the storage end of sample transmission rod, and the storage end is arranged in high-vacuum chamber, so that frozen sample is arranged above the objective lens. Structured light illumination system is arranged at the rear side of microscope main body, for emitting structured light to high-vacuum chamber, structured light is irradiated on frozen sample by passing through lower light hole, realizes frozen structured light illumination imaging, solves the problem of low resolution in prior art optical imaging and low positioning accuracy of light mirror electron microscope imaging correlation.

The invention discloses a small-size coaxial transmit-receive optical module, which is used for a laser radar, and comprises a transmitting light path assembly, a beam combination light path coupling assembly and a receiving light path assembly, beam combination is carried out by using a polarization state, and a light path of the transmitting light path assembly can obtain a smaller emergent light spot, so that the receiving light path assembly has a larger receiving aperture equivalently; the system detection capability is improved; meanwhile, the beam combining module can further improve the integration level through gluing and integrated coating and is convenient to install; the receiving light path assembly adopts a U-shaped folding structure and a telecentric light path design, long-focus receiving can be realized under a relatively short physical size, an incident angle CRA of a main light ray is controlled in a relatively small range, inclined projection of a light spot on a photosensitive target surface of a detector is relatively small, response convergence is relatively good, and meanwhile, high integration level and high receiving efficiency are taken into consideration.