Drilling by gas lens focused laser

Michaelis, M.M.; Notcutt, M.; Cunningham, P. F.

doi:10.1016/0030-4018(86)90360-3

Cited by 15 publications

(8 citation statements)

References 4 publications

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“…These lenses were used for imaging distant objects [4] and proposed for applications in astronomy. Focusing of laser beams for metal cutting applications was also successfully demonstrated in heated tube lenses [5]. In spinning tube gas lenses the diameter of the lens is typically smaller than its length, limiting the field of view and speed of the lens [6].…”

Section: Introductionmentioning

confidence: 99%

Lensing properties of rotational gas flow

Kaganovich¹,

Johnson²,

Gordon³

et al. 2018

Appl. Opt.

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Section: Introductionmentioning

confidence: 99%

Lensing properties of rotational gas flow

Kaganovich¹,

Johnson²,

Gordon³

et al. 2018

Appl. Opt.

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“…Both electron and ion distributions were seen to be significantly distorted when compared with those produced under optimal focussing conditions. Instabilities within the gas lens and small scale turbulence both within and around the tube ends have been shown to degrade the gas lens focus (Notcutt et al 1988). These unwelcome effects may promote focussing properties equivalent to those of astigmatism in glass lens systems.…”

Section: Discussionmentioning

confidence: 99%

“…Diffraction limited focal spots, produced by a vertical gas lens of 25 mm diameter, have been used to drill holes in metal sheets (Michaelis et al 1986), although the mechanism by which such a diffraction limited spot is attained is still under investigation. Most recently a 25 mm horizontal gas lens has been constructed that produces a relatively steady focus by means of controlled turbulence (Notcutt et al 1988).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of gas lens laser-produced plasmas

Waltham¹,

Notcutt²,

Cunningham³

et al. 1990

Laser Part. Beams

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A Q-switched ruby laser, focussed by means of both gas and glass lenses, was used to irradiate massive planar carbon targets. Two different laser configurations were used, giving differing spatial beam qualities. Faraday cups positioned at various angles about the target were used to monitor ion flow properties of the resulting laser-produced plasmas. These flow properties were used to compare the laser-plasma producing characteristics of the lenses.

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“…Previous studies have shown that the SPGL imitates a graded index (GRIN) medium with a refractive index which is a maximum along the axis and decreases parabolically with radial distance r, towards the walls (Michaelis, 1986;Forbes, 1997;Mafusire, 2006) …”

Section: Gas Lensesmentioning

confidence: 99%

“…The investigation into this version of this gas lens design, now called the spinning pipe gas lens, or SPGL for short, was taken over by the then University of Natal without the knowledge of the research in the former USSR. They worked with a vertical lens which was used for focusing a high power laser for drilling holes into metal sheets (Michaelis, 1986). Another improvement was to combine both rotation and gas injection to create a steady focus (Notcutt, 1988).…”

Section: Wwwintechopencommentioning

confidence: 99%