北京荷兰OCé牌无氨半干式晒图机

由北京科学仪器厂与荷兰合作生产的oce牌晒图机是更新换代的晒图机新产品,它排除了氨熏灯烤的恶劣生产环境,并且即晒即得,操作方便,特别适用于工厂、研究院所和高等院校。此oce208型为半干法联合式晒图机,即曝光与显影在同一台机器上完成,其曝光原理是利用紫外光与晒图纸上的重氮盐发生     

晒图机氨泵修理一法

我厂一台CCTO—4型晒图机,它的供氨系统如图1所示。其工作原理是:安装在主动轴上的偏心凸轮(9)使机械泵(3)内的皮碗做往复运动,将塑料桶内的氨水压入溢流阀(6),经分流后,一部分由阀门(5)控制,经滴量计(4)注入熏筒,另一部分多余的氨水由回水管流回塑料桶(2)。 这台晒图机任务十分繁重紧迫。在每天工作5～6小时的情况下,该晒图机氨水不流了,氨泵坏了。当拆开氨泵修理时发现是皮碗破了。手头没有备件,一时又     

CZ2010晒图机常见故障与消除对策

晒图机的工作程序如下。底图与晒图纸随玻璃滚筒旋转感光,经分离装置后,底图与晒图纸自动分离,感光后的晒图纸在氨箱与晒图管之间通过,晒图纸经氨箱中热氨气薰蒸后显成蓝色,蓝     

新型晒图机

上海市金山晒图机厂具有20多年生产晒图机的历史,工厂生产工艺先进、设备齐全、技术力量雄厚、测试手段完善。生产的主要产品有:SD1200A型、SD1200F型、SDL1180型自控晒图机等“金山牌”系列产品。其中SD1200A型晒图机曾荣获市重大科技成果奖和上海市优质产品证书,并被轻工业部指定为国内晒图纸生产厂家唯一检测纸品质量用机;SD1200F型高速晒图机是上海市星火计划项目,具有晒制速度快、三级调光(3000W光源可分别调至     

晒图机氨泵的改进

CGO-4型晒图机显影方法为干氨水法,工业速度50～300m/h,环境温度30～50℃,空气温度30～90％的条件下工件。 原驱动方式:利用偏心凸轮的转动压紧压板(图1),使泵内的皮碗作往复运动,氨水压入溢流阀进入熏筒,如果在气温低或者温度较低但开机时间短的情况下,图纸需曝光时间长,工作速度慢。氨泵的速度是晒图机的主轴直接带动的,速度一慢,泵内的压力     

基于PLC的自动晒图机控制软件设计

本文叙述了自动晒图机的PLC控制电路的结构组成及控制原理,分析了系统传感器的作用,详细介绍了晒图机的工作过程及软件控制流程。该系统的软硬件控制与机械结构紧密配合,功能齐全,自动化程度高,性能稳定,满足广大用户的需求。     

封闭式无油高压氦气压缩机

原子能及一般产业界和研究室,对于在高温高压惰性气体介质中作材料试验等,为了安全起见,使用氦气的情况更多起来。 过去,作为高压氦气压缩机曾经使用膜式或往复式无油压缩机,虽然有许多缺点,但没有能代替这两个机种的。三国重工业公司为满足这方面要求致力于设计和制造无油高压氦气压缩机,结果试制成功了排气压力160公斤/厘米2（表压）的该机种,兹介绍如下（图1）:     

友嘉：跨国品牌全球技术

FFG友嘉集团国外业务部襄理洪崇育对记者介绍,此次TMTS2014,友嘉展出247个摊位,超过20种强势机种,从入门的泛用型机种,中阶复合型机种,到高阶五轴同动机种,让不同需求的使用者,都能够获得全方位满足。除了友嘉、丽伟、松颖、众程、胜杰等知名本土品牌外,更有合资品牌友嘉高松、和井田友嘉以及友嘉万客隆,呈现集团企业的策略布局与多角化发展．     

项目工程施工设备调遣计划与经济分析

建筑安装企业(或统称承包商)实行项目工程管理时,根据投资规模、施工特点、施工环境、合同条件以及工程所在地的地理水文等因素,准确地预测出应投入的施工设备机种与数量,不仅是项目工程管理的必须,对于国有资产的保值增值、资本经营等都是必要的。 一、项目工程投资规模与单机种施工设备初步预测 项目工程中承包商的建安工程量是根据业主的投资规模确定的,其中所包含的机械费用总额是施工设备调遣计划的前提和依据。施工过程中,调遣施工设备所发生的各种费用之和,不得超出建安工程量中的机械费用。所以,工程承包合同签订后,应根据工程预算定额预测总机械费用和各机种实作机械台班数量,然后依据下列公式初步计算项目工程施工中单机种设备总需求量。     

86-8无油润滑成膜涂料

86-8无油润滑成膜涂料是我厂研制成功并使用的新型润滑材料。它的主要作用是减少机械齿轮传动中的齿面塑性变形、磨粒磨损、咬合磨损,延长设备使用寿命及节约润滑油料。例1:1986年将1986-8无油润滑成膜涂料用于15t行车齿轮箱(5个)解决了齿轮箱严重漏油现象。同时也减小了齿轮箱的噪音,其他性能也良好。维修工和操作工都十分满意。例2:资料室晒图机齿轮箱(齿轮最大直径为φ42d5~(-0.10),节圆直径为φ40,齿数为40,     

新型X光成像系统及其性能分析

本文设计了新型的X光成像系统，它的核心部件X光影像增强器是一个混合型器件。该成像系统具有数字化、大视野成像和可移动的优点，成像视野在6-15英寸连续可调。在文中，对这种新型成像系统的成像性能进行了定量的评价，并给出了系统所成的图像。结果表明新型X光成像系统的性价比高，可以广泛应用在机场安检、工业探伤、无损检测等领域。     

声光可调谐滤波成像光谱仪的CCD成像电子学系统

考虑声光可调谐滤波(AOTF)成像光谱仪的需求,设计了它的CCD成像电子学系统.选用e2v公司的CCD芯片CCD57-10作为图像传感器,提出了DC/DC+ LDO的架构实现各偏置电压;基于现场可编程门阵列(FPGA)等器件产生驱动时钟,AD9826完成CCD输出模拟信号到数字信号的转换,并通过USB及CameraLink接口与计算机通信.设计了CCD保护电路,并优化了数模混合电路的印刷电路板(PCB)布局结构.对各功能单元的实际测试表明:各偏置电压纹波噪声峰峰值小于10 mV;AD转换精度达12 bit;系统能够正确成像,图像传输速率可达10 frame/s,图像信噪比优于54 dB,系统总功耗不足5W.设计结果满足AOTF成像光谱仪对CCD成像电子学系统的要求.     

荧光成像系统对比度分析与成像仿真

目前荧光成像技术在生物医学领域得到越来越广泛的应用。为了缩短产品设计和开发周期,且能更直观地反映系统的成像效果,根据各模块光谱特性曲线,提出了荧光成像链路模型。利用该模型,对荧光成像系统的对比度进行了分析,验证了滤光片光密度(OD)值的合理范围是在5~7之间。最后以荧光显微镜为例,对系统成像过程进行了仿真。结果表明,各模块不匹配也会对系统对比度产生影响,仿真图像能够直观反映出系统的匹配程度和成像效果,并与实际系统测试结果相吻合,证明了该链路模型仿真的可行性和有效性。     

Three-dimensional imaging in confocal imaging systems with finite sized detectors

We consider the effect of the finite size of the detector on both the lateral and axial resolution of the confocal system. The use of a finite sized detector means that the imaging is no longer truly coherent. We find that the lateral resolution is considerably more sensitive to the detector size than is the axial response. The question of the rejection of flare light is also considered. Experimental results are shown and we find that acceptable extended-focus, auto-focus and height images may be obtained from non truly-confocal systems. We also find that lens apodization has a far greater effect on the axial resolution than the lateral resolution.     

CMOS图像传感器成像系统

介绍 CMOS图像传感器的历史背景、发展现状、像素单元的结构、工作原理以及CMOS图像传感器芯片的整体结构 ,比较了 CMOS图像传感器和 CCD图像传感器的性能 ,详细阐述了整个 CMOS图像传感器成像系统     

Harmonic optical microscopy and fluorescence lifetime imaging platform for multimodal imaging

In this work, we proposed and built a multimodal optical setup that extends a commercially available confocal microscope (Olympus VF300) to include nonlinear second harmonic generation (SHG) and third harmonic generation (THG) optical (NLO) microscopy and fluorescence lifetime imaging microscopy (FLIM). We explored all the flexibility offered by this commercial confocal microscope to include the nonlinear microscopy capabilities. The setup allows image acquisition with confocal, brightfield, NLO/multiphoton and FLIM imaging. Simultaneously, two‐photon excited fluorescence (TPEF) and SHG are well established in the biomedical imaging area, because one can use the same ultrafast laser and detectors set to acquire both signals simultaneously. Because the integration with FLIM requires a separated modulus, there are fewer reports of TPEF+SHG+FLIM in the literature. The lack of reports of a TPEF+SHG+THG+FLIM system is mainly due to difficulties with THG because the present NLO laser sources generate THG in an UV wavelength range incompatible with microscope optics. In this article, we report the development of an easy‐to‐operate platform capable to perform two‐photon fluorescence (TPFE), SHG, THG, and FLIM using a single 80 MHz femtosecond Ti:sapphire laser source. We described the modifications over the confocal system necessary to implement this integration and verified the presence of SHG and THG signals by several physical evidences. Finally, we demonstrated the use of this integrated system by acquiring images of vegetables and epithelial cancer biological samples. Microsc. Res. Tech. 2012. © 2012 Wiley Periodicals, Inc.     

Quasianamorphic optical imaging system with tomographic reconstruction for electron beam imaging

We have developed a quasianamorphic optical tomography system coupled to a streak camera to provide continuous recording of the electron beam profile of an intense, long-pulse induction accelerator. A tomographic reconstruction method based on a maximum-entropy algorithm is used to reconstruct the images. The system has simplified the calculation of beam moments, eliminated ambiguity due to beam motion, and contributed to accelerator tuning.     

Backscattered electron imaging and scanning transmission electron microscopy imaging of multi-layers

Experimental and theoretical results on image contrast of semiconductor multi-layers in scanning electron microscopy investigation are reported. Two imaging modes have been considered: backscattered electron imaging of bulk specimen and scanning transmission imaging of thinned specimens. The following main results have been reached. The image resolution of the multi-layers is, in both cases, defined by the probe size. The contrast, governed by density and atomic number differences, is affected by the size of the interaction volume in backscattered electron imaging and by the beam broadening in scanning transmission. Operating in the scanning transmission mode, the contrast of bright field images can be easily related to local variation in atomic number and density of the specimen while the dark field image contrast is strongly affected by electron beam energy, detector collection angles and specimen thickness. All these factors are able to produce contrast reversals that are difficult to explain without the support of a suitable simulation code.     

Fluorescence bleach rate imaging

Bleach rate imaging on a (cooled) CCD can be easily achieved using a confocal microscope with bilateral scanning and detection coupled to a workstation; it is as easy as acquiring regular fluorescence images. Several analysis and display methods for bleach rate imaging are presented such as the bleach map (and its inverse) and a matrix-based decomposition method for multi-labelled specimens based on the bleach rate differences between the dyes used. With these tools, bleach-rate-based imaging can become a viable alternative to multiple labelling techniques for component identification in fluorescent specimens.