35mm×22mm original double blazed grating. Its parameters are: wavelength = 632.8 nm, grating constant td-0 (refractive index n ~ 1.9) of silicon nitride film, spatial frequency T7.3 PL/mm of l367mm, gray number: 16, shining angle: 0b-tsri-1(h Step 1, the embossed modulation phase recording material is selected according to the actual requirements, the groove shape of the double blazed grating is designed by a computer, a data file with the lattice number of 4096×2732 is generated, and an ARIES-L image processing system controlled by a VAX computer -23- computer is used to output the grating original image with continuous gray distribution on the recording film; Step two. The selected recording material (domestic 2 12 positive glue) is exposed, copied and micro-copied, so that the amplitude grating with gray distribution is transformed into the phase grating with relief modulation, that is, the conclusion that the double blazed grating with the required size is obtained. A new method of designing and fabricating double blazed gratings by computer is proposed. According to the actual needs, it is convenient to design grating grooves suitable for various purposes and choose the shining wavelength and shining angle. Considering the influence of transfer function in manufacturing process, the phase function is modified. It has the characteristics of flexible control, convenient manufacture, easy replication and lower cost than the traditional diamond cutting technology. It can be used as a stamper for large-scale stamper replication and is widely used. References Lu Rong Guotai , C ~ Inejount ~ toflaser ~ (English version), 1992, 1, No{LurongGuoetaI .., P.sp 1, 19965438+. Savoi Instrumental Journal T 1988, No.9,3 Xie Jianping, Journal of Optics, 1985, No.5, No.35, No.2 Xie Jianping, ETA 1. Journalalofchinaungvrsity Science and Technology, 19855 No.2 Liao Ping, 1996. 16 (5) Liao Ping, physics of Lgsfi4 Oak Equality University, China Laser (to be printed), 1996[ America] , Optical Information Processing, Nankai University Press, Tianjin, 1986, 1 17 (continued from page 46) The contents of heparin and antithrombin I increased, the aggregation and capture of platelets and red blood cells decreased, the concentration of fibrinogen decreased, and the fibrinolytic activity increased, thus reducing the blood viscosity, keeping the blood in a low coagulation state and relieving pulmonary artery. IL can not improve the fat transport function, increase the stability of erythrocyte membrane, restore the ion channel function to normal, inhibit the proliferation of vascular smooth muscle and the deposition of LDL, thus correcting the abnormal lipid metabolism. Through observation, it also shows that ILIB has good antiarrhythmic effect, which can improve the clinical symptoms of cor pulmonale and improve the effective rate and total effective rate. ILm can increase the blood oxygen tension of capillaries, accumulate 2,3-DPG on erythrocyte membrane, shift the oxygen dissociation curve to the right, and enhance the utilization rate of tissue oxygen], and improve the hemorheology and dredge microcirculation, thus improving ischemic and hypoxic myocardium and reducing the occurrence of arrhythmia. ILIB has an interesting and good effect on humoral immunity and cellular immunity. It can reduce eosinophils in sputum by 465,438+05, and increase the number of pulmonary macrophages obviously, which can activate the function of adrenocortical hormone. The inspiratory volume and vital capacity increased significantly, the lung residual volume decreased, the sensitivity of bronchial receptors to sympathetic nerve and cholinergic substances increased, and Pc. The number of red blood cells and feather red blood cells increased, which played an anti-hypoxia and anti-inflammatory role and obviously relieved clinical symptoms. In a word, ILIB is effective in treating chronic pulmonary heart disease, with no obvious side effects and simple operation, which is worthy of clinical promotion.

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Here's another paragraph. I don't know if it will help.

Terminology for gas industry of infrared spectrophotometer. It is an infrared spectrometer that uses prism or grating to split light. The infrared light emitted by the light source is divided into two completely symmetrical beams: the reference beam and the sample beam. They are modulated by a semicircular modulation mirror and alternately enter the slit of the monochromator. After being separated by prism or grating, the intensity difference between the two beams of light is detected by thermocouple. When there is no sample absorption in the optical path of the sample beam, the thermocouple does not output a signal. Once the test sample is placed, the sample will absorb infrared light, and there is an intensity difference between the two beams of light. The thermocouple has a signal output of about 10Hz, which is amplified and transmitted to the motor. Adjust the optical wedge on the optical path of the reference beam so that the intensities of the two beams are balanced again. The recording position of the pen directly indicates the sample transmittance at a certain wavelength, and the continuous change of wave number automatically records the infrared absorption spectrum or transmission spectrum of the sample. Infrared spectrophotometer is the first high-performance infrared spectrophotometer product in China that adopts the principle of computer direct proportional recording. It fills the gap at home and abroad, is at the leading level in China, and occupies the main market of domestic infrared instruments. The instrument has realized man-machine dialogue, simple operation and perfect functions, and can be widely used in petroleum, chemical industry, medicine, environmental protection, teaching, material science, public security and national defense. It is an indispensable analytical and testing instrument for scientific research, production and teaching.

Also, I found that there was a paper written by Xu Ping and Du Chunlei on the computer design and manufacturing method of double blazed gratings in No.01of Applied Laser, but it was too old to find the original text. Excuse me, if you are interested, please look for it. If this is what you want, there is nothing I can do.