WO1999065638A1 - Laser processing station - Google Patents

Abstract

The present invention relates to a laser processing station that comprises a powerful transverse-flow gas laser. The laser is capable of radiating an output beam having an elliptic shape, wherein said beam is elongated in a direction which is perpendicular to the plane of the gas flow that crosses a gas-discharge chamber. The transparent output window and the objective lens have an elongated shape corresponding to the section of the output laser radiation that crosses them.

Description

\ νθ 99/65638 ΡСΤЛΡШ98 / 00185

INSTALLATION FOR LASER PROCESSING.

The area of technology. Pρedποlagaemοe izοbρeτenie οτnοsiτsya κ οblasτi sοzdaniya lazeρnοy τeχniκi and mοzheτ byτ isποlzοvanο πρi ρazρabοτκe gazοvyχ lazeροv ρazlichnοgο πρimeneniya, τaκοgο κaκ svaρκa, ρezκa, naπlavκa, τeρmοuπροchnenie ρazlichnyχ maτeρialοv.

The prevailing level.

The installation for laser processing known to us for the manufacture is known. Οna sοsτοiτ of mοschnοgο bysτροπροτοchnοgο gazοvοgο lazeρa with usτοychivym οdnοmοdοvym ρezοnaτοροm, sisτemy τρansπορτiροvκi and φοκusiροvκi lazeρnοgο πuchκa, vκlyuchayuschey linzοvy οbeκτiv vyχοdnοe οκnο and a length of προzρachnοgο vοlny maτeρiala [1].

Κ dοsτοinsτvu προτοτiπa mοzhnο οτnesτi vysοκοe κachesτvο lazeρnοy ρezκi, on account οbesπechivaemοe minimalnοgο ρazmeρa sφοκusiροvannοgο ιguchκa, οbesπechivaemοgο linzοy and uzκοy vysοκοnaπορnοy sτρuey ρezhuschegο gas vyρyvayuschegοsya of sοπla in zοnu φοκalnοgο πyaτna.

Οdnaκο svοysτvοm eτοy usτanοvκi yavlyaeτsya nizκaya πρedelnο vοzmοzhnaya mοschnοsτ lazeρnοgο beam οπρedelyaemaya vysοκimi τeρmichesκimi isκazheniyami and naπρyazheniyami in vyχοdnοm οκne and in the lens caused nebοlyποy, nο suschesτvennοy dοley mοschnοsτi πuchκa, ποglοschennοy in the lens and vyχοdnοm οκne. The consequence of this is the relatively low productivity of the laser process. \ ΥΟ 99/65638 ΡСΤ / Ш.98 / 00185

DISCLOSURE OF INVENTION.

The objective of the invention is to increase the productivity of the laser process due to the increase in the output capacity of the laser beam without any significant inconvenience.

Task izοbρeτeniya ρeshaeτsya τem, chτο οπτichesκy ρezοnaτορ bysτροπροτοchnοgο lazeρa φορmiρueτ vyχοdnοy πuchοκ elliπτichesκοgο section πρichem bοlshaya οs elliπsa ορienτiροvana ποπeρeκ gazοvοgο ποτοκa in ρazρyadnοy κameρe, πρi eτοm in eτοm naπρavlenii radiation zaποlnyaeτ ποchτi all zazορ ρazρyadnοy κameρy. In the direction along the gas supply, the size of the outlet beam is substantially limited. The usual size of the beam along with the flow is chosen so that the beam changes insignificantly when changing the length of the beam transmission system. In the case of a large C0 ₂ laser with a wavelength of 10.6 μm, the minimum dimensions are 15–20 mm and the size of the beam is 60 mm in maximum.

Κaκ ποκazanο in [2], in τeρmοdeφορmatsii προzρachnyχ dieleκτρiκaχ κρuglοgο sectional πρaκτichesκi not zavisyaτ οτ πlοτnοsτi mοschnοsτi προχοdyaschegο cheρez niχ πuchκa and zavisyaτ only οτ ποlnοy, προχοdyaschey cheρez niχ, mοschnοsτi. Β in the case of a window or lenses of an elliptical form of therapy, thermal treatment, thermal effects are significantly diminished due to a significant increase in the cost of a visit, Practically for ellipses with an increase in the length of the “3” places, there is a two-fold increase in weekly loads νθ 99/65638 ΡСΤ / ΙШ98 / 00185

3 or a decrease in the thermal distortion π and the same ray loads, i.e. At the very least, by two times increase the productivity of the laser process.

Quick description of the drawings. Operation and operation of the device is explained in Fig. 1. Here: 1 - a gas fast laser with a portable gas supply,

1.1 - an optical laser cut-out, including end mirrors 1.1.1 and 1.1.2.

1.2 - the channel of the discharged camera, through which with the help of the fans 1.4 the gas stream is pumped 1.3.

The best radiation from laser 3.1 is output through a window of 1.5 elliptical cross-sections. The final radiation 3.1 also has an elliptical cross-section (type Φ Fig. 3.1), which is also a normal, but not the same size. Pοsle οτρazheniya οτ ποvοροτnοgο zeρκala 3 or sisτemy ποvοροτnyχ zeρκal radiation naπρavlyaeτsya on φοκusiρuyuschy οbeκτiv 4 πρedsτavlyayuschy sοbοy lens from 4.1 to προzρachnοgο length vοlny lazeρa maτeρiala τaκzhe elliπτichesκοgο section (look Α, ποzitsiya 4.1) vκlyuchayuschegο a sοπlο 4.2. A composite lens 4.1 emits radiation after a loss of 4.2; at the same time, the discharge gas is disposed of when there is a discharge from \ ΥΟ 99/65638 ΡСΤЛШ98 / 00185

4

Β The result is that the larger ellipse of the caustic 85 is cut off by the entire cross-section of the gas-discharge camera

1.2, in fast gas lasers 1 with emergency transceiver

1.3, the essential κ.p.d. and the output power of the laser.

Elliptic section of the partition of the outlet and the output

90 beams can be realized by small options. These options are shown in Figure 2.

1. The non-resilient version shown in Fig. 2 (a) has end spherical partitions 1.1.1 and 1.1.2. Mirror 1.1.1 is discharged, and Mirror 1.1.2 is concave, in other words, the points of etiology

95 flies. The best radiation of the resonator in this case is formed if a short circuit is received in the form of a short bend, which bends a little. If the mirror 1.1.1 has an elliptical cross-section (uninspired internal part of Fig. 2 (a)) with a smaller size of 2a and a larger size of 2c, it is emitted that

and internal - 2a and 2c, with ичУа = Β / в = Μ, where Μ - is the coefficient of increase in the unstable result that is inconvenient in connection with the situation _. ι _. ι / Κιд. ₂

105 features of the end of the mirror.

2. SUSTAINABLE RESISTANCE. In this case, the mirror 1.1.1 is as simple as it may be, a useful, cross-section is a convenient cross-section of the exit beam. The elliptical cross-section of the output part will be divided in this case by the shape and size of the diaphragm, which is located in front of the output loop 1.1.1. \ УΟ 99/65638 ΡСΤ / ΙШ98 / 00185

5

In the case where the diaphragm has a cross section shown in Fig. 26. OUTPUT BUNDLE 3.1 has the same cross section.

Β case, if the smaller aperture has a size ρ size Α 2Α,

115 slightly larger (approximately 1.5 times) than the main load sockets

This is the case illustrated in Fig. 2d. Β eτοm case πlοsκοsτi menyπegο section κausτiκi ρezοnaτορa ρealizueτsya οdnοmοdοvaya geneρatsiya with ρazmeροm _πsh ^ ⁼ 2ννο, and πeρπendiκulyaρnοy πlοsκοsτi suschesτvenna

120 multi-generation with size ме χ χ _χ = 2 =.

3. It is also disconnected, described in [3, 4], which is in a single use (non-compliant) is non-compliant, but in the case of

125 Thus, either a two-sided output of radiation (Fig. 2c), or a single output (Fig. 2d) is realized. Β πlοsκοsτi usτοychivοsτi ρezοnaτορa ρealizueτsya Gaussοva οsnοvnaya mοda _tt ^ 2 ⁼ \ ν _0, and πlοsκοsτi neusτοychivοsτi libο κοlοκοlοοbρazny radiation προφil with vyρezannοy seρdtsevinοy (Φig.2v) ά _taχ = 2Β, ιzο libο κοmπaκτnοe πuchκa section (Φig.2g) g = _taχ 2Β.

To increase the increase in the maximum and minimum sizes of 3.1 to the output window of 1.5, and to further increase the free-load, to decrease the load

135 direction to the exit ball.

For many process laser applications, it is sufficient to have an elliptical spot in the focus of the lens. For example, this is a laser cutting, welding, and processing method, which are in the same direction. \ ν _θ 99/65638 ΡСΤ / ΙШ98 / 00185

6

140 In this case, as it is in focus, it is also realized on the spot with an elliptical cross-section. If the ellipse is minimal, the transverse direction of the laser gun or laser cutting is limited, then the maximum k.p.d. and the productivity of the process.

145

BEST MODE FOR CARRYING OUT THE INVENTION.

However, for such technical and surgical procedures, as laser cutting and welding, it is desirable to have a physical circle of the circle. In this case, the width or

150 width of the seam (especially in connection with the local polarization of radiation) will be unchanged and will not depend on the direction of cutting or welding.

Л The recommended option is to receive a small amount of money, notwithstanding the fact that the bundle is directed to

155 lens, has an elliptical cross-section. This is due to the fact that the size in the focus of the lens is determined by the sum of the two factors [2]:

1). The emission of radiation θ and optical radiation Ρ.

2). With a spherical aberration, which is προπορаcional

160 of the third size of the beam and the direct-to-access part of the lens are located on the front of the unit.

For that, in the case of a product in the form of a product, you should take a large, neces- sary, to equate with a special aberration in the case of a ди ³ уч

165 spot, which is obtained in focus due to the diffraction of guccus in the minimum section ά _Ρ = Θ _тιη Ρ, \ νθ 99/65638 ΡСΤЯШ98 / 00185

7 where Α is the aberration coefficient, which changes with the change in the index of lens refraction; ά _тαχ - diameter beam in maximum cross section; 170 Ρ - Focusing lenses.

Fifthly, a short one is received in focus, due to the diffraction of a small beam size ά _Ρ = Θ _t- Ρ, we equate to a fifth aberration:

here Θ _meticulous - it is suitable for use in the area of at least 175 heap size. ά "that ^χ _ s _ Θ_1__ShΙ go _ <___ / ___! __. ₌ _ 1 3 Θ tι ^η

Ρ V Α Ρ ε H Α

Knowing ά ι _{t t} ε, Α Θ and _tϊη mοzhnο οπρedeliτ οπτimalnοe value φοκusnοgο ρassτοyaniya Ρ _οηt πρi κοτοροm φοκalnοe πyaτnο budeτ κρuglοgο section.

For example: С0 ₂ -lazeρ, (-! „_ = 12mm

Lens made from chlorate κ kaliya (ΚСΙ) with a refractive index η = 1.45 Θ _t1η = 1.5-10 ^"3 , ε = 3, Α = 0.08 [2]

When the optimal focus is available, it will also be sold.

185 in the center of the fifth round section will be:

\ νθ 99/65638 ΡСΤЯШ98 / 00185

8

190 Literature.

1. Medical lasers. A compilation in 2 years ago. G.Α. Bilbsiytova. / Russia, Chashinostroenie. 1991 Τ. 1. Ch. 5 § 23. Fast lasers of the “Spectrum Physics” section p. 142--148. 195 2.C. Golubev, Φ.Β. Lebedev "Engineering fundamentals of technological lasers" / Moscow "Higher school", 1987.

3. Μ.G. Galushkin, Β.S. Goulev, Β.Β. Dembovetsky, Α.Μ. Zabelin. The study of physical and technical factors that determine the quantitative radiation of industrial C0 ₂ - lasers

200 Kilometers of land. / News of the Academy of Sciences. The series is physical. τ.60, -Υ 12, 1996, ctρ. 157 - 164.

4. Patent Ρ Ν ° 2092947 “Sustainable gas laser with a stable - unstable Resistance” Zabelina Α.Μ. / Bulletin Ν ° 28 for 1997

205

210

215

Claims

\ ╬╜╬╕ 99/65638 ╬í╨í╬ñ╨ ¢ ╨¿98 / 001859 ╬ª╬┐╧ü╨╝╤â╨╗╨░ ╨╕╨╖╬┐╨▒╧ü╨╡╧ä╨ ╡╨╜╨╕╤Å.

1. ╨ú╤ü╧ä╨░╨╜╬┐╨▓╬║╨░ ╨┤╨╗╤Å ╨╗╨░╨╖╨╡╧ü╨╜╬┐╨╣ ╬┐╨▒╧ü╨░ ╨▒╬┐╧ä╬║╨╕, ╤ü╬┐╤ü╧ä╬┐╤Å╤ë╨░╤╨░╤ ╨╕╨╖ 220 ╨╝╬┐╤ë╨╜╬┐╨│╬┐ ╨│ ╨░╨╖╬┐╨▓╬┐╨│╬┐ ╨╗╨░╨╖╨╡╧ü╨░ ╤ü ╧Ç╬┐╧Ç╨╡╧ü╨╡╤ç╨╜╬┐╨╣ ╧Ç ╧ü╬┐╬║╨░╤ç╬║╬┐╨╣ ╨│╨░╨╖╨░ (1), ╤ü╬┐╨┤╨╡╧ü╨╢╨░╤ë╨╡╨│╬┐ ╨│╨░╨╖╬┐╧ü╨░╨╖╧ü╤Å╨┤╨╜╤â╤Ä ╬║╨░╨╝╨╡╧ü╤â (1.2), ╬┐╧Ç╧ä╨╕ ╤ç╨╡╤ü╬║╨╕╨╣ ╧ü╨╡╨╖╬┐╨╜╨░╧ä╬┐╧ü (1.1) ╨╕ ╧Ç╧ü╬┐╨╖╧ü╨░╤ç╨ ╜╬┐╨╡ ╨▓╤ï╧ç╬┐╨┤╨╜╬┐╨╡ ╬┐╬║╨╜╬┐ (1.5), ╤ü╨╕╤ü╧ä╨╡╨╝╤ï ╧ä╧ ü ╨░╨╜╤ü╧Ç╬┐╧ü╧ä╨╕╧ü╬┐╨▓╬║╨╕ ╨╕ ╧å╬┐╬║╤â╤ü╨╕╧ü╬┐╨▓╬║╨╕ ╨╕╨╖╨╗╤â╤ç╨╡╨╜╨╕╤Å, ╤ü╬┐╨┤╨╡╧ü╨╢╨░╤ë╨╕╨╡ ╧Ç╬┐╨▓╬┐╧ü╬ ┐╧ä╨╜╤ï╨╡ ╧Ç╬┐╨╗╨╜╬┐╤ü╧ä╤î╤Ä ╬┐╧ä╧ü╨░╨╢╨░╤Ä╤ë╨╕╨╡ ╨╖╨ ╡╧ü╬║╨░╨╗╨░ (3) ╨╕ ╧å╬┐╬║╤â╤ü╨╕╧ü╤â╤Ä╤ë╨╕╨╣ ╨╗╨╕╨╜╨╖╬┐ ╨▓╤ï╨╣ ╬┐╨▒╤è╨╡╬║╧ä╨╕╨▓ (4),

225 ╬┐╧ä╨╗╨╕╤ç╨░╤Ä╤╤╨░╤╨░╤╤╤╤ ╧ä╨╡╨╝, ╤ç╧ä╬┐ ╨╝╬┐╤ë╨╜╤ï╨╣ ╨│╨░╨╖╬┐╨▓╤ï╨╣ ╨╗╨░╨╖╨╡╧ü ╤ü ╧Ç╬┐╧Ç╨╡╧ü╨╡╤ç╨╜╬┐╨╣ ╧Ç╧ü ╬┐╬║╨░╤ç╬║╬┐╨╣ (1) ╨▓╤ï╧Ç╬┐╨╗╨╜╨╡╨╜ ╤ü ╨▓╬┐╨╖╨╝╬┐╨╢╨╜╬ ┐╤ü╧ä╤î╤Ä ╨╕╨╖╨╗╤â╤ç╨╡╨╜╨╕╤Å ╨▓╤ï╧ç╬┐╨┤╨╜╬┐╨│╬┐ ╧Ç╤â╤ ç╬║╨░ ╤ì╨╗╨╗╨╕╧Ç╧ä╨╕╤ç╨╡╤ü╬║╬┐╨╣ ╧å╬┐╧ü╨╝╤ï (3.1), ╨▓╤ï╧ ä╤Å╨╜╤â╧ä╬┐╨│╬┐ ╨▓ ╨╜╨░╧Ç╧ü╨░╨▓╨╗╨╡╨╜╨╕╨╕, ╧Ç╨╡╧ü╧Ç╨╡ ╨╜╨┤╨╕╬║╤â╨╗╤Å╧ü╨╜╬┐╨╝ ╧Ç╨╗╬┐╤ü╬║╬┐╤ü╧ä╨╕ ╨│╨░╨╖╬┐╨▓ ╬ ┐╨│╬┐ ╧Ç╬┐╧ä╬┐╬║╨░ (1.3), ╧Ç╧ü╬┐╧ç╬┐╨┤╤Å╤ë╨╡╨│╬┐ ╤ç╨╡╧ü╨ ╡╨╖ ╨│╨░╨╖╬┐╧ü╨░╨╖╧ü╤Å╨┤╨╜╤â╤Ä ╬║╨░╨╝╨╡╧ü╤â (1.2), ╨░ ╧Ç╧ ü╬┐╨╖╧ü╨░╤ç╨╜╬┐╨╡ ╨▓╤ï╧ç╬┐╨┤╨╜╬┐╨╡ ╬┐╬║╨╜╬┐

230 (1.5) ╨╕ ╨╗╨╕╨╜╨╖╨░ (4.1) ╬┐╨▒╤è╨╡╬║╧ä╨╕╨▓╨░ ╨▓╤ï╧Ç╬┐╨╗╨╜╨ ╡╨╜╤ï ╨▓╤ï╧ä╤Å╨╜╤â╧ä╤ï╨╝╨╕ ╤ü╬┐╬┐╧ä╨▓╨╡╧ä╤ü╧ä╨▓╨╡╨╜╨ ╜╬┐ ╤ü╨╡╤ç╨╡╨╜╨╕╤Ä ╧Ç╧ü╬┐╧ç╬┐╨┤╤Å╤ë╨╡╨│╬┐ ╤ç╨╡╧ü╨╡╨╖ ╨ ╜╨╕╧ç ╨▓╤ï╧ç╬┐╨┤╨╜╬┐╨│╬┐ ╨╕╨╖╨╗╤â╤ç╨╡╨╜╨╕╤Å ╨╗╨░╨╖╨╡╧ ü╨░ (3.1).

2. ╨ú╤ü╧ä╨░╨╜╬┐╨▓╬║╨░ ╨┤╨╗╤Å ╨╗╨░╨╖╨╡╧ü╨╜╬┐╨╣ ╬┐╨▒╧ü╨░ ╨▒╬┐╧ä╬║╨╕ ╧Ç╬┐ ╧Ç. 1, ╬┐╧ä╨╗╨╕╤ç╨░╤Ä╤╤╨░╤╨░╤╤╤╤ ╧ä╨╡╨╝, ╤ç╧ä╬┐ ╬┐╧Ç╧ä╨╕╤ç╨ ╡╤ü╬║╨╕╨╣ ╧ü╨╡╨╖╬┐╨╜╨░╧ä╬┐╧ü (1.1) ╨▓╤ï╧Ç╬┐╨╗╨╜╨╡╨╜

235 ╤â╤ü╧ä╬┐╨╣╤ç╨╕╨▓╬┐-╨╜╨╡╤â╤ü╧ä╬┐╨╣╤ç╨╕╨▓╤ï╨╝ ╤ü ╧Ç╨╗ ╬┐╤ü╬║╬┐╤ü╧ä╤î╤Ä ╨╜╨╡╤â╤ü╧ä╬┐╨╣╤ç╨╕╨▓╬┐╤ü╧ä╨╕, ╬┐╧ü╨ ╕╨╡╨╜╧ä╨╕╧ü╬┐╨▓╨░╨╜╨╜╬┐╨╣ ╧Ç╬┐╧Ç╨╡╧ü╨╡╬║ ╧Ç╬┐╧ä╬┐╬║╨ ░ (1.3).

3. ╨ú╤ü╧ä╨░╨╜╬┐╨▓╬║╨░ ╨┤╨╗╤Å ╨╗╨░╨╖╨╡╧ü╨╜╬┐╨╣ ╬┐╨▒╧ü╨░ ╨▒╬┐╧ä╬║╨╕ ╧Ç╬┐ ╧Ç. 2, ╬┐╧ä╨╗╨╕╤ç╨░╤Ä╤╤╨░╤╨░╤╤╤╤ ╧ä╨╡╨╝, ╤ç╧ä╬┐ ╤â╤ü╧ä╬┐╨╣╤ ç╨╕╨▓╬┐-╨╜╨╡╤â╤ü╧ä╬┐╨╣╤ç╨╕╨▓╤ï╨╣ ╧ü╨╡╨╖╬┐╨╜╨░╧ä╬┐╧ü (1.1) ╨╕╨╝╨╡╨╡╧ä ╬┐╨┤╨╜╬┐╤ü╧ä╬┐╧ü╬┐╨╜╨╜╨╕╨╣ ╨▓╤ï╧ç╬┐╨┤.

240 4. ╨ú╤ü╧ä╨░╨╜╬┐╨▓╬║╨░ ╨┤╨╗╤Å ╨╗╨░╨╖╨╡╧ü╨╜╬┐╨╣ ╬┐╨▒╧ü╨ ░╨▒╬┐╧ä╬║╨╕ ╧Ç╬┐ ╨╗╤Ä╨▒╬┐╨╝╤â ╨╕╨╖ ╧Ç. ╧Ç. 2, 3, ╬┐╧ä╨╗╨╕╤ç╨░╤Ä╤╤╨░╤╤╤╤╤ ╧ä╨╡╨╝, ╤ç╧ä╬┐ ╧Ç╧ü╬┐╨╖╧ ü╨░╤ç╨╜╬┐╨╡ ╨▓╤ï╧ç╬┐╨┤╨╜╬┐╨╡ ╬┐╬║╨╜╬┐ (1.5) ╧ü╨░╤ü╧Ç╬┐╨╗ ╬┐╨╢╨╡╨╜╬┐ ╧Ç╬┐╨┤ ╤â╨│╨╗╬┐╨╝ ╨æ╧ü╤Ä╤ü╧ä╨╡╧ü╨░ ╬║ ╨╜╨░╧Ç ╧ü╨░╨▓╨╗╨╡╨╜╨╕╤Ä ╨╗╤â╤ç╨░ (3.1).

5. ╨ú╤ü╧ä╨░╨╜╬┐╨▓╬║╨░ ╨┤╨╗╤Å ╨╗╨░╨╖╨╡╧ü╨╜╬┐╨╣ ╬┐╨▒╧ü╨░ ╨▒╬┐╧ä╬║╨╕ ╧Ç╬┐ ╨╗╤Ä╨▒╬┐╨╝╤â ╨╕╨╖ ╧Ç. ╧Ç. 1, 2, 3, ╬┐╧ä╨╗╨╕╤ç╨░╤Ä╤╨░╤╨░╤╨░╤╤╤╤ ╧ä╨╡╨╝, ╤ç╧ä╬┐ ╨╗╨╕╨╜╨ ╖╬┐╨▓╤ï╨╣ ╬┐╨▒╤è╨╡╬║╧ä╨╕╨▓ (4.1) ╨▓╤ï╧Ç╬┐╨╗╨╜╨╡╨╜ ╤ü

245 ╧å╬┐╬║╤â╤ü╨╜╤ï╨╝ ╧ü╨░╤ü╤ü╧ä╬┐╤Å╨╜╨╕╨╡╨╝, ╬┐╧Ç╧ü╨╡╨┤ ╨╡╨╗╤Å╨╡╨╝╤ï╨╝ ╤ü╨╗╨╡╨┤╤â╤Ä╤ë╨╕╨╝ ╤ü╬┐╬┐╧ä╨╜╬┐╤ê╨╡╨╜ ╨╕╨╡╨╝: \ ╨ú╬ƒ 99/65638 ╬í╨í╬ñ╨ ¢ ╨¿98 / 00185

10

╨│╨┤╨╡ ╬¼ _{╬▒╬¼╬▒} - ╨┤╨╕╨░╨╝╨╡╧ä╧ü ╧Ç╤â╤ç╬║╨░ ╨▓ ╧Ç╨╗╬┐╤ü╬ ║╬┐╤ü╧ä╨╕ ╨╝╨╕╨╜╨╕╨╝╨░╨╗╤î╨╜╬┐╨│╬┐ ╤ü╨╡╤ç╨╡╨╜╨╕╤Å; ╨╝╨╝. 250 ╬¼ _{╤é╨░╧ç} - ╨┤╨╕╨░╨╝╨╡╧ä╧ü ╧Ç╤â╤ç╬║╨░ ╨▓ ╤ê╤Ä╤ü╬║╬┐╤ü╧ä ╨╕ ╨╝╨░╬║╤ü╨╕╨╝╨░╨╗╤î╨╜╬┐╨│╬┐ ╤ü╨╡╤ç╨╡╨╜╨╕╤Å ╧Ç╤â╤ç╬║ ╨░; ╨╝╨╝.

Ρ - φοκуснοе ρассτοяние линзы; мм.

 " _т _η - ρасχοдимοсτь излучения в πлοсκοсτи минимальнοгο сеч ения πучκа;

╬æ - ╨░╨▒╨╡╧ü╧ü╨░╤å╨╕╬┐╨╜╨╜╤ï╨╣ ╬║╬┐╤ì╧å╧å╨╕╤╨╕╤╨╕╨╡╨╜╧ ä ╨╗╨╕╨╜╨╖╤ï.

╬æ╨▓╧ä╬┐╧ü ^ ^ ╤ü╨½╬ ¢ -, ^{╨ù╨░╨▒╨╡╨╗╨╕╨╜ ╬æ * ╬ £} -

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