66results about How to "Good interference effect" patented technology

The invention discloses a device for visually monitoring cryogenic fluid based on laser interferometry. The device comprises a vacuum box and a test tube which is arranged in the vacuum box, wherein the test tube is provided with two inner light window panes; the vacuum box is provided with two outer light window panes; the device also comprises an optical measurement system; the optical measurement system comprises a laser emitter, a beam expander, a collimating lens, a light splitter, a first reflecting mirror, a second reflecting mirror, a screen and a camera. The device can be used for obtaining concentration distribution of the cryogenic fluid surface through the laser interferometry and accurately and visually monitoring behavioral characteristics of the cryogenic fluid; by arranging the four light window panes, the light can transmit the cryogenic fluid; by arranging the second reflecting mirror, the light can transmit in the cryogenic fluid for two times, so that the interference effect can be enhanced; the optical measurement system of the device is arranged outside the vacuum box; the vacuum box is small in size and is capable of adjusting all the parts of the optical measurement system at any time during testing, so that the experiment is relatively convenient to operate.

The invention discloses a large-numerical-aperture laser lens imaging inspection system. A single-mode monochromatic light source and an optical fiber collimating mirror form a parallel light system,a to-be-measured laser lens is slidably installed between the optical fiber collimating mirror and a standard objective lens along the optical axis and is used for focusing incident parallel light beams into a focus light spot, and the position of the focus light spot coincides with the focus of the standard objective lens. The standard objective lens and a standard tube lens form a conjugate imaging system, and the conjugate imaging system is used for amplifying the focus light spot into a focused light beam image and projecting the focused light beam image to an area array CCD element, the position of the area array CCD element coincides with the focus of the standard tube lens, the amplification factor of the conjugate imaging system is 10X-100X, and the numerical aperture NA of the to-be-measured laser lens is smaller than or equal to the numerical aperture NA of the standard objective lens. The system has the advantages of being flexible in operation, high in visibility and easy in judgment and standardization, the quality and efficiency of laser optical lens design and optical inspection are improved, and higher production efficiency and more normative inspection quality control are achieved for laser lens production.

The invention provides a narrowband reflective film. The narrowband reflective film comprises a transparent substrate layer and a reflective film system. The reflective film system comprises n high-low refractive index material units. The reflective film system comprises at least one film stack having a film structure of |([alpha]1H[beta]1L[alpha]2H[beta]2L...[alpha]mH[beta]mL)|, wherein n and m are positive integers, and 3<n<=150, 3<m<=50, m<=n. The [alpha]1, [alpha]2, ..., [alpha]m and [beta]m, ..., [beta]2, [beta]1 in the same film stack each independently satisfies the same gradient law onthe same cosine waveform or sinusoidal waveform. In [alpha]iH[beta]iL, [alpha]i represents the optical thickness of the ith high refractive index material layer as a multiple of [lambda]/4, [beta]i represents the optical thickness of the ith low refractive index material layer as a multiple of [lambda]/4, |[alpha]1-[beta]m|, |[alpha]2-[beta]m-1|, |[alpha]3-[beta]m-2|, ..., |[alpha]m-[beta]1| areeach independently between 0.01 and 0.2.

The invention provides an infrared broadband cut-off filter, an optical filter and a camera. The filter comprises a transparent base material layer, a near-infrared reflecting film and a light absorber, the near-infrared reflecting film is arranged on one surface of a transparent base material layer or distributed on two opposite surfaces of the transparent base material layer; the device is usedfor cutting off light with a wavelength range of 700-1300nm. The near-infrared reflecting film comprises a plurality of cut-off units; the cut-off units form m membrane stacks; assuming that the membrane system structure of the membrane stack A theta is | V theta (alpha1H beta1L alpha2H beta2L-Alpha nH betanL) |, wherein n and m are positive integers, n is larger than 3 and smaller than or equal to 80, and alpha 1, alpha 2-alpha n and beta 1, beta 2-beta n in the same membrane stack independently meet the same gradient rule on the same cosine or sine waveform; 1 < = m < = 10; and [alpha] i and[beta] i are each independently in the range of 0.2 to 1.5. The cut-off width of the infrared cut-off filter is large.

The invention discloses an MEMS micromirror, and the MEMS micromirror comprises a substrate and a mirror surface structure, wherein the mirror surface is located on one side of the substrate, a gap is formed between the first surface of the mirror surface and the first surface of the substrate, incident light rays emitted by a light source irradiate on the second surface of the substrate, and the incident light rays irradiate on the second surface of the substrate. The first part of incident light is reflected by the second surface of the substrate to form first reflected light, the second part of incident light is reflected by the first surface of the mirror surface structure to form second reflected light, and the first reflected light and the second reflected light are coupled to form first interference light. According to the interference system, based on the characteristics of MEMS chip surface reflection and substrate surface reflection, an interference light path is formed by coupling light reflected by a non-moving substrate and light reflected by a moving mirror surface structure in an MEMS micromirror, the interference requirement of a Michelson system is met, the arrangement of a fixed mirror is reduced, the optical path assembly efficiency of the interference system is effectively improved, and the cost of the optical structure is greatly reduced.

The invention provides a narrowband reflective film, which comprises a transparent substrate layer and a reflective film system. The reflective film system comprises n high/low refractive index material units and at least one film stack having a film system structure of |(alpha1H[beta]1L[alpha]2H[beta]2L...[alpha]mH[beta]mL)|, wherein, the H represents a high refractive index material layer, L represents a low refractive index material layer, and n and m are positive integers, wherein the 3<n<=150, 3<m<=50, m<=n. Alpha1, alpha2,..., and [alpha]m, and [beta]m,..., beta2, and beta1 of the same film stack independently satisfy the same gradient law on the same cosine waveform or sinusoidal waveform. For the i-th high/low refractive index material unit [alpha]iH[beta]iL, 1<=i<=n, [alpha]i represents the optical thickness of the i-th high refractive index material layer as a multiple of lambda/4, and [beta]i represents the optical thickness of the i-th low refractive index material layer asa multiple of lambda/4. The reflective film system or the transparent substrate layer is further provided with a light absorbing agent.

The present invention discloses a simplified Sagnac interference element based on reflective blazed gratings. The simplified Sagnac interference element based on the reflective blazed grating is characterized by comprising a polarizing beam splitter, the reflective blazed gratings, a polaroid, an imaging optical system and an interference pattern reception surface, wherein the parallel incident light beams are divided into P light and S light via the polarizing beam splitter; the P light goes ahead along a direction reverse with the incident light beams after being reflected by a first reflective blazed grating and a second reflective blazed grating orderly, is reflected by the polarizing beam splitter and then is orderly projected by the polaroid and the imaging optical system to the interference pattern reception surface; the S light is reflected by the second reflective blazed grating and the first reflective blazed grating, then is transmitted through the polarizing beam splitter, the polaroid and the imaging optical system along a direction vertical with the incident light beams and then is projected to the interference pattern reception surface; and the interference element obtains the interference patterns on the interference pattern reception surface aiming at the parallel incident light beams. According to the present invention, the requirements of a white light polarized interferometer can be satisfied.

The invention relates to a high-molecular polymer for treating tumors and a preparation method and application thereof, and belongs to the technical field of medicines. The preparation method comprises the following steps: synthesizing PEGMA-(RAFT); synthesizing PEGMA-b-PDPA-(RAFT); synthesizing PEGMA-b-PDPA-b-PDMAEMA-(RAFT); desulfurization reaction; and synthesizing the high-molecular polymer ma< 1 >-PMDM. The invention also discloses the high-molecular polymer prepared by the preparation method and used for treating tumors and application of the high-molecular polymer. According to the preparation method, the high-molecular polymer for treating tumors can be prepared very efficiently; the high-molecular polymer can improve the stability of the carrier, improve the cellular uptake capacity and improve the transfection capacity, the composition and the structure of the carrier have the capacity of overcoming the lysosome biological barrier, and the high-molecular polymer can be applied to a targeting drug carrier for treating tumors.