共查询到18条相似文献,搜索用时 93 毫秒
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<正> 以往高精度棱镜(角度10″以内)加工方法都是用光胶法。这种方法工艺复杂,要求工装工具精度高,加工比较麻烦,成本也高。我们通过试验和实际加工证明,高精度棱镜(5″~10″)可以用玻璃靠模的方法加工。这种方法工装加工比较容易,棱镜角度能达到要求,基本不破坏其它已抛光好的表面。几种典型的棱镜,如30°、45°、60°、90°、112°30′等的棱镜都能加工。这种棱镜靠模,不怕加热,不怕水冲,坚固耐用。下面以30°棱镜为例说明靠模制造和棱镜的加工方法。 相似文献
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随着光学技术的发展,越来越需要广泛地采用高精度棱镜,这就给棱镜加工工艺提出了更高的要求。而现在,许多工厂对高精度棱镜的90°角大都采用“长方体”加工,但“长方体”不能解决棱镜任意角和同时解决两种光学平行差的精度要求。“棱镜体”就是将“长方体”加工棱镜90°角的原理推广到加工任意角棱镜的一种光学工具。 相似文献
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高精度角度加工技术研究 总被引:3,自引:2,他引:1
激光陀螺不仅对合光棱镜角度精度有极高的要求,而且对角度和尺寸的一致性有严格的限制。为了加工这种高精度角度光学元件,提出通过手修工装母体复制出成盘加工工装,再复制出光学零件的加工方法,并分析了测角仪的测量精度、面形之间的匹配误差和平行的测量误差所引入的角度加工误差情况,提高了面形加工的平面度,避免了局部不规则现象,控制了温差对面形变化的影响。另外通过降低平行测量的误差以及减小闭合角度之间的叠加误差等具体措施也可以提高光学元件加工效率和角度加工精度。 相似文献
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介绍了BBG602棱镜组的加工工艺。在BBG602棱镜组的加工过程中,由于影响棱镜组精度的因素很多,因此棱镜组胶合过程的控制贯穿了整个生产过程。通过对棱镜组转像规率的分析,进一步了解了胶合过程对指导棱镜组加工的重要性。通过用该方法加工棱镜组,实践证明是合理可行的。 相似文献
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长方体是一种角度、面形均具有高精度要求的光学工具。随着光学仪器的发展,具有高精度90°角的屋脊棱镜、直角棱镜和五角棱镜等被大量采用,长方体的需要量在不断的增加。可是,制造长方体还比较困难,需要配备高精度的测量仪器、专用工装和设备。加工出一副长方体要付出很高的代价,对具有高精度90°角的棱镜的生产十分不利。为了改变这种状况,本文对长方体的加工方法从平行差的加工、90°角的加工和90°角的检验等方面进行了介绍,实践证明效果良好。 相似文献
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<正> 棱镜是光学仪器中经常采用的零件之一,它的制造精度和加工效率直接影响到整个仪器的性能和仪器制造业的发展。所以,在编制一种棱镜加工工艺时,技术人员往往要采取各种措施,来提高零件精度和生产效率,降低劳动强度,从而加工出理想的光学零件。但是,目 相似文献
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本文从光学工艺角度出发,主要叙述了中低精度光学毛坯的工艺性能简化压型,并分别对棱镜、透镜进行了叙述。同时导出了体积等算式以便设计工艺性简化毛坯,从而设计出压模。从前辈及同行们的探讨、验证知,本文所述问题正是民用产品生产中承待解决的问题。如此论述或许可为毛坯精化问题添砖加瓦,也为在现有二次压型工艺改进的前提下,最终实现光学毛坯精化而呐喊助威。本文的撰写过程中曾得到前辈指教及同行的支持,在此致以衷心的感谢。 相似文献
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Ultra-high pressure belt-type die was designed with a large sample volume prism cavity and a split cylinder which was divided into eight segments to eliminate circumferential stress. The cylinder of this type die has no cambered surface on inner wall, and the inner hole is a hexagonal prism-type cavity. The divided bodies squeeze with each other, providing the massive support and lateral support effect of the cylinder. Simulation results indicate that the split cylinder with the prism cavity possesses much smaller stress and more uniform stress distribution. The split cylinder with the prism cavity has been shown to bear larger compressive stresses in radial, circumferential and axial directions due to its structure, and tungsten carbide is most effective in pure compression so this type cylinder could bear higher pressure. Experimental results prove that the high pressure apparatus with a prism-type cavity could bear higher pressure. The apparatus with a prism cavity could bear 52.2% more pressure than the belt-type die. 相似文献
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We investigated the influence exerted by the conditions of preparation of specimens of fibrous materials made of polyethylene
terephthalate and triacetate threads and fabrics and the conditions of recording IR spectra of modified frustrated total internal
reflection (MFTIR) on the reproducibility of spectral characteristics. We found that the area of actual contact of fibrous
meterials with a reflecting prism and the reproducibility of spectral characteristics can be considerably increased by applying
preliminary pressing and increasing the pressure of clamping the materials to the prism. We determined the optimum values
of the parameters for preparing specimens and recording MFTIR spectra that make it possible to carry out, with sufficient
accuracy, spectrophotometering of fibrous specimens made of polyethylene terephthalate and triacetate fabrics and threads.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 1, pp. 103–107, January–February, 1997. 相似文献
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In this paper a single-DMD infrared scene projector with a high contrast ratio prism design of the illumination optical system is presented. By using the innovative infrared three-element TIR prism group, the off-state and flat-state light that reflected by the DMD could be all steered away from the projection lens. The contrast ratio and optical efficiency has been improved with this three-element TIR prism as the light-separator. This DMD infrared scene projector also features low-profile and compact structure. The illumination and projection optical systems are proved to be of great efficient light utilization. In this letter we analyze the impacts of optical efficiency on temperature simulation. This architecture with three-element TIR prism added could be used in IRSP based single-DMD to improve contrast and optical efficiency. 相似文献
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依据全反射理论和棱镜耦合原理,实现了对棱镜折射率及波导薄膜材料折射率和厚度的同步测量。使用高准直半导体激光器激光入射到棱镜内部与波导膜的分界面上,逐步旋转棱镜或改变棱镜的入射角,得到棱镜耦合M线,曲线前面几组的波谷为波导模激发,在M线左侧收尾处有一个不完整波峰,其反射光强随入射角迅速衰减,为全反射时的临界点,由此可实现棱镜及波导薄膜参数的同步测量;用此法测量了棱镜耦合一体化平面波导棱镜的折射率和聚甲基丙烯酸甲酯(PMMA)聚合物波导薄膜的折射率和厚度。测量棱镜折射率精度为±1.9×10-4,波导薄膜折射率和厚度的精度分别为±6.2×10-4 μm和±1.6×10-2 μm。 相似文献