Calcium Fluoride (CaF2)
Plano-Concave Lenses

Plano-concave lo ntsiab muag yog cov lo ntsiab muag tsis zoo uas yog tuab ntawm ntug dua li nyob rau hauv nruab nrab, thaum lub teeb dhau los ntawm lawv, nws diverges thiab lub ntsiab lus tseem ceeb yog virtual.Lawv focal ntev yog qhov tsis zoo, nrog rau lub vojvoog ntawm curvature ntawm qhov chaw nkhaus.Muab lawv qhov tsis zoo ntawm lub cev tsis zoo, cov lo ntsiab muag plano-concave tuaj yeem ua haujlwm kom sib npaug ntawm qhov sib txawv ntawm qhov sib txawv los ntawm lwm lub lo ntsiab muag hauv qhov kho qhov muag.Plano-concave lo ntsiab muag yog qhov muaj txiaj ntsig zoo rau kev sib faib cov kab sib txuas thiab sib txuas cov kab sib txuas, lawv tau siv los nthuav cov kab teeb ci thiab ua kom qhov ntev focal ntev hauv cov tshuab kho qhov muag uas twb muaj lawm.Cov lo ntsiab muag tsis zoo no feem ntau yog siv hauv telescopes, koob yees duab, lasers lossis tsom iav los pab cov tshuab ua kom pom tseeb dua.

Plano-concave lo ntsiab muag ua tau zoo thaum cov khoom thiab cov duab nyob ntawm qhov sib xyaw ua ke, ntau dua 5: 1 lossis tsawg dua 1: 5.Nyob rau hauv cov ntaub ntawv no, nws muaj peev xwm txo tau spherical aberration, coma, thiab distortion.Ib yam li nrog cov lo ntsiab muag plano-convex, kom ua tiav qhov kev ua tau zoo tshaj plaws ntawm qhov nkhaus ntawm qhov chaw yuav tsum fim qhov loj tshaj plaws ntawm qhov deb lossis qhov kev sib txuas tsis kawg kom txo qis qhov sib txawv ntawm qhov sib txawv (tshwj tsis yog thaum siv nrog lub zog siab lasers qhov no yuav tsum tau thim rov qab los tshem tawm qhov ua tau ntawm lub tshuab virtual. tsom).

Vim nws qhov kis tau tus mob siab ntawm 0.18 µm txog 8.0 μm, CaF2 nthuav tawm qhov ntsuas qis qis sib txawv ntawm 1.35 txog 1.51 thiab feem ntau siv rau cov ntawv thov uas xav tau kev sib kis siab hauv infrared thiab ultraviolet spectral ranges, nws muaj qhov ntsuas qhov ntsuas ntawm 1.4 µm2. .Calcium fluoride kuj tseem muaj tshuaj lom neeg tsis zoo thiab muaj qhov nyuaj dua piv rau nws cov barium fluoride, thiab magnesium fluoride cov kwv tij.Paralight Optics muaj Calcium Fluoride (CaF2) plano-concave lo ntsiab muag nrog antireflection coatings rau 2 µm txog 5 µm wavelength ntau yam tso rau ntawm ob qhov chaw.Cov txheej no zoo heev txo qhov kev xav ntawm lub substrate, yields qhov nruab nrab kis tau tus mob ntau tshaj 97% ntawm tag nrho AR txheej.Tshawb xyuas cov duab hauv qab no rau koj cov ntaub ntawv siv.

Nta:

Khoom siv:

Calcium Fluoride (CaF2)

Txheej Options:

Uncoated los yog nrog Antireflection Coatings

Focal Lengths:

Muaj los ntawm -18 mus rau -50 mm

Daim ntawv thov:

Haum rau siv hauv Excimer Laser Applications, hauv Spectroscopy thiab Txias Thermal Imaging

Common Specifications:

pro-related-ico — Reference Drawing rau

Plano-concave (PCV) Lens

f: Focal Length
f_b: Rov qab Focal Length
R: Radius ntawm Curvature
t_c: Center Thickness
t_e: Ntug Thickness
H”: Rov Qab Tus Thawj Coj Dav Hlau

Lus Cim: Lub focal ntev yog txiav txim siab los ntawm lub dav hlau sab nraum qab, uas tsis tas yuav kab nrog ntug thickness.

Tsis muaj

Ntau Yam & Tolerances

Cov khoom siv substrate

Calcium Fluoride (CaF2)
Hom

Plano-Concave (PCV) Lens
Index ntawm Refraction (nd)

1.428 @ Nd:Yag 1.064 μm
Abbe Number (Vd)

95.31 ib
Thermal Expansion Coefficient (CTE)

18.85 x 10^-6/ ℃
Txoj kab uas hla Tolerance

Precision: +0.00/-0.10mm |High Precision: +0.00/-0.03 hli
Center Thickness kam rau ua

Precision: +/- 0.10 hli |High Precision: +/- 0.03 hli
Focal Length kam rau ua

+/- 2%
Surface Quality (Scratch-Dig)

Nqe: 80-50 |High Precision: 60-40
Nto Flatness (Plano Sab)

hl/4
Spherical Surface Power (Convex Sab)

3 hl/2
Surface Irregularity (Peak rau Valley)

hl/2
Qhov chaw

Qhov tseeb:<3 arcmin |High Precision:<1 arcmin
Clear Aperture

90% ntawm txoj kab uas hla
AR Txheej ntau yam

2-5 μm
Kev xa tawm dhau txheej txheej (@ 0 ° AOI)

Qhov hnyav> 97%
Reflectance dhau txheej txheej (@ 0 ° AOI)

Ravg<1.25%
Tsim Wavelength

588nm ua