Axicon lens focusing

from math import *

#Axicon focus: https://www.edmundoptics.com/knowledge-#center/application-notes/lasers/an-in-depth-look-at-axicons/

#constant ring size t, but totoal size dr increase with distance L

alpha = 40 # angle of apha in degree unit
alpha = alpha*pi/180
D = 4 # Beam diameter mm
R = D/2 # radius of incident beam
n= 1.46 # refractive index of lens
L = 5 # distance from lens

#DOF

DOF1 = Rsqrt(1-nnsin(alpha)sin(alpha))
DOF2 = sin(alpha)cos(alpha)(ncos(alpha)-sqrt(1-nnsin(alpha)sin(alpha)))
DOF = DOF1/DOF2

#t: ring thickness

t1 = DOF1
t2 = cos(alpha)* (nsin(alpha)sin(alpha)+cos(alpha)sqrt(1-nnsin(alpha)sin(alpha)))
t= t1/t2

#dr: totoal spot size (outside of ring edge)

dr1 = sin(alpha)(ncos(alpha)-sqrt(1-nnsin(alpha)sin(alpha))) dr2 = nsin(alpha)sin(alpha) + cos(alpha)sqrt(1-nnsin(alpha)sin(alpha)) dr = 2L*dr1/dr2

print(f’Incident beam size ={2*R} (mm)’)
print(f’DOF={DOF} (mm)’)
print(f’Ring thickness={t} (mm)’)
print(f’Ring size in total={dr} (mm)’)

from math import *


# Axicon focus: https://www.edmundoptics.com/knowledge-center/application-notes/lasers/an-in-depth-look-at-axicons/
# constant ring size t, but totoal size dr increase with distance L 
# 
alpha = 40   # angle of apha in degree unit
alpha = alpha*pi/180
D = 4   # Beam diameter mm
R = D/2   # radius of incident beam
n= 1.46       # refractive index of lens
L = 5     # distance from lens

# DOF
DOF1 = R*sqrt(1-n*n*sin(alpha)*sin(alpha))
DOF2 = sin(alpha)*cos(alpha)*(n*cos(alpha)-sqrt(1-n*n*sin(alpha)*sin(alpha)))
DOF = DOF1/DOF2

#t: ring thickness
t1 = DOF1
t2 = cos(alpha)* (n*sin(alpha)*sin(alpha)+cos(alpha)*sqrt(1-n*n*sin(alpha)*sin(alpha)))
t= t1/t2

#dr: totoal spot size (outside of ring edge)
dr1 = sin(alpha)*(n*cos(alpha)-sqrt(1-n*n*sin(alpha)*sin(alpha)))
dr2 = n*sin(alpha)*sin(alpha) + cos(alpha)*sqrt(1-n*n*sin(alpha)*sin(alpha))
dr = 2*L*dr1/dr2

print(f'Incident beam size ={2*R} (mm)')
print(f'DOF={DOF} (mm)')
print(f'Ring thickness={t} (mm)')
print(f'Ring size in total={dr} (mm)')

Fw: UV lamp

UV lamp 

 

Mae croeso i chi gysylltu gyda’r Brifysgol yn Gymraeg neu Saesneg

You are welcome to contact the University in Welsh or English

Rhif Elusen Gofrestredig 1141565 – Registered Charity No. 1141565

Gall y neges e-bost hon, ac unrhyw atodiadau a anfonwyd gyda hi, gynnwys deunydd cyfrinachol ac wedi eu bwriadu i’w defnyddio’n unig gan y sawl y cawsant eu cyfeirio ato (atynt). Os ydych wedi derbyn y neges e-bost hon trwy gamgymeriad, rhowch wybod i’r anfonwr ar unwaith a dilewch y neges. Os na fwriadwyd anfon y neges atoch chi, rhaid i chi beidio a defnyddio, cadw neu ddatgelu unrhyw wybodaeth a gynhwysir ynddi. Mae unrhyw farn neu safbwynt yn eiddo i’r sawl a’i hanfonodd yn unig ac nid yw o anghenraid yn cynrychioli barn Prifysgol Bangor. Nid yw Prifysgol Bangor yn gwarantu bod y neges e-bost hon neu unrhyw atodiadau yn rhydd rhag firysau neu 100% yn ddiogel. Oni bai fod hyn wedi ei ddatgan yn uniongyrchol yn nhestun yr e-bost, nid bwriad y neges e-bost hon yw ffurfio contract rhwymol – mae rhestr o lofnodwyr awdurdodedig ar gael o Swyddfa Cyllid Prifysgol Bangor.

This email and any attachments may contain confidential material and is solely for the use of the intended recipient(s). If you have received this email in error, please notify the sender immediately and delete this email. If you are not the intended recipient(s), you must not use, retain or disclose any information contained in this email. Any views or opinions are solely those of the sender and do not necessarily represent those of Bangor University. Bangor University does not guarantee that this email or any attachments are free from viruses or 100% secure. Unless expressly stated in the body of the text of the email, this email is not intended to form a binding contract – a list of authorised signatories is available from the Bangor University Finance Office.

520nm 1000MW 1W Green Optical Semiconductor Laser Fiber Coupled Output Digital Display Adjustable Power Supply FC Connector

 

Mae croeso i chi gysylltu gyda’r Brifysgol yn Gymraeg neu Saesneg

You are welcome to contact the University in Welsh or English

Rhif Elusen Gofrestredig 1141565 – Registered Charity No. 1141565

Gall y neges e-bost hon, ac unrhyw atodiadau a anfonwyd gyda hi, gynnwys deunydd cyfrinachol ac wedi eu bwriadu i’w defnyddio’n unig gan y sawl y cawsant eu cyfeirio ato (atynt). Os ydych wedi derbyn y neges e-bost hon trwy gamgymeriad, rhowch wybod i’r anfonwr ar unwaith a dilewch y neges. Os na fwriadwyd anfon y neges atoch chi, rhaid i chi beidio a defnyddio, cadw neu ddatgelu unrhyw wybodaeth a gynhwysir ynddi. Mae unrhyw farn neu safbwynt yn eiddo i’r sawl a’i hanfonodd yn unig ac nid yw o anghenraid yn cynrychioli barn Prifysgol Bangor. Nid yw Prifysgol Bangor yn gwarantu bod y neges e-bost hon neu unrhyw atodiadau yn rhydd rhag firysau neu 100% yn ddiogel. Oni bai fod hyn wedi ei ddatgan yn uniongyrchol yn nhestun yr e-bost, nid bwriad y neges e-bost hon yw ffurfio contract rhwymol – mae rhestr o lofnodwyr awdurdodedig ar gael o Swyddfa Cyllid Prifysgol Bangor.

This email and any attachments may contain confidential material and is solely for the use of the intended recipient(s). If you have received this email in error, please notify the sender immediately and delete this email. If you are not the intended recipient(s), you must not use, retain or disclose any information contained in this email. Any views or opinions are solely those of the sender and do not necessarily represent those of Bangor University. Bangor University does not guarantee that this email or any attachments are free from viruses or 100% secure. Unless expressly stated in the body of the text of the email, this email is not intended to form a binding contract – a list of authorised signatories is available from the Bangor University Finance Office.

Laser shock peening

Laser-Peening-diagram

 

Mae croeso i chi gysylltu gyda’r Brifysgol yn Gymraeg neu Saesneg

You are welcome to contact the University in Welsh or English

Rhif Elusen Gofrestredig 1141565 – Registered Charity No. 1141565

Gall y neges e-bost hon, ac unrhyw atodiadau a anfonwyd gyda hi, gynnwys deunydd cyfrinachol ac wedi eu bwriadu i’w defnyddio’n unig gan y sawl y cawsant eu cyfeirio ato (atynt). Os ydych wedi derbyn y neges e-bost hon trwy gamgymeriad, rhowch wybod i’r anfonwr ar unwaith a dilewch y neges. Os na fwriadwyd anfon y neges atoch chi, rhaid i chi beidio a defnyddio, cadw neu ddatgelu unrhyw wybodaeth a gynhwysir ynddi. Mae unrhyw farn neu safbwynt yn eiddo i’r sawl a’i hanfonodd yn unig ac nid yw o anghenraid yn cynrychioli barn Prifysgol Bangor. Nid yw Prifysgol Bangor yn gwarantu bod y neges e-bost hon neu unrhyw atodiadau yn rhydd rhag firysau neu 100% yn ddiogel. Oni bai fod hyn wedi ei ddatgan yn uniongyrchol yn nhestun yr e-bost, nid bwriad y neges e-bost hon yw ffurfio contract rhwymol – mae rhestr o lofnodwyr awdurdodedig ar gael o Swyddfa Cyllid Prifysgol Bangor.

This email and any attachments may contain confidential material and is solely for the use of the intended recipient(s). If you have received this email in error, please notify the sender immediately and delete this email. If you are not the intended recipient(s), you must not use, retain or disclose any information contained in this email. Any views or opinions are solely those of the sender and do not necessarily represent those of Bangor University. Bangor University does not guarantee that this email or any attachments are free from viruses or 100% secure. Unless expressly stated in the body of the text of the email, this email is not intended to form a binding contract – a list of authorised signatories is available from the Bangor University Finance Office.

RWE Wales

 

 

Mae croeso i chi gysylltu gyda’r Brifysgol yn Gymraeg neu Saesneg

You are welcome to contact the University in Welsh or English

Rhif Elusen Gofrestredig 1141565 – Registered Charity No. 1141565

Gall y neges e-bost hon, ac unrhyw atodiadau a anfonwyd gyda hi, gynnwys deunydd cyfrinachol ac wedi eu bwriadu i’w defnyddio’n unig gan y sawl y cawsant eu cyfeirio ato (atynt). Os ydych wedi derbyn y neges e-bost hon trwy gamgymeriad, rhowch wybod i’r anfonwr ar unwaith a dilewch y neges. Os na fwriadwyd anfon y neges atoch chi, rhaid i chi beidio a defnyddio, cadw neu ddatgelu unrhyw wybodaeth a gynhwysir ynddi. Mae unrhyw farn neu safbwynt yn eiddo i’r sawl a’i hanfonodd yn unig ac nid yw o anghenraid yn cynrychioli barn Prifysgol Bangor. Nid yw Prifysgol Bangor yn gwarantu bod y neges e-bost hon neu unrhyw atodiadau yn rhydd rhag firysau neu 100% yn ddiogel. Oni bai fod hyn wedi ei ddatgan yn uniongyrchol yn nhestun yr e-bost, nid bwriad y neges e-bost hon yw ffurfio contract rhwymol – mae rhestr o lofnodwyr awdurdodedig ar gael o Swyddfa Cyllid Prifysgol Bangor.

This email and any attachments may contain confidential material and is solely for the use of the intended recipient(s). If you have received this email in error, please notify the sender immediately and delete this email. If you are not the intended recipient(s), you must not use, retain or disclose any information contained in this email. Any views or opinions are solely those of the sender and do not necessarily represent those of Bangor University. Bangor University does not guarantee that this email or any attachments are free from viruses or 100% secure. Unless expressly stated in the body of the text of the email, this email is not intended to form a binding contract – a list of authorised signatories is available from the Bangor University Finance Office.

Live From The Field

MDPI Photonics reference endnote style

 

Mae croeso i chi gysylltu gyda’r Brifysgol yn Gymraeg neu Saesneg

You are welcome to contact the University in Welsh or English

Rhif Elusen Gofrestredig 1141565 – Registered Charity No. 1141565

Gall y neges e-bost hon, ac unrhyw atodiadau a anfonwyd gyda hi, gynnwys deunydd cyfrinachol ac wedi eu bwriadu i’w defnyddio’n unig gan y sawl y cawsant eu cyfeirio ato (atynt). Os ydych wedi derbyn y neges e-bost hon trwy gamgymeriad, rhowch wybod i’r anfonwr ar unwaith a dilewch y neges. Os na fwriadwyd anfon y neges atoch chi, rhaid i chi beidio a defnyddio, cadw neu ddatgelu unrhyw wybodaeth a gynhwysir ynddi. Mae unrhyw farn neu safbwynt yn eiddo i’r sawl a’i hanfonodd yn unig ac nid yw o anghenraid yn cynrychioli barn Prifysgol Bangor. Nid yw Prifysgol Bangor yn gwarantu bod y neges e-bost hon neu unrhyw atodiadau yn rhydd rhag firysau neu 100% yn ddiogel. Oni bai fod hyn wedi ei ddatgan yn uniongyrchol yn nhestun yr e-bost, nid bwriad y neges e-bost hon yw ffurfio contract rhwymol – mae rhestr o lofnodwyr awdurdodedig ar gael o Swyddfa Cyllid Prifysgol Bangor.

This email and any attachments may contain confidential material and is solely for the use of the intended recipient(s). If you have received this email in error, please notify the sender immediately and delete this email. If you are not the intended recipient(s), you must not use, retain or disclose any information contained in this email. Any views or opinions are solely those of the sender and do not necessarily represent those of Bangor University. Bangor University does not guarantee that this email or any attachments are free from viruses or 100% secure. Unless expressly stated in the body of the text of the email, this email is not intended to form a binding contract – a list of authorised signatories is available from the Bangor University Finance Office.