Method for measuring position-dependent volume reflection

R. A. Bolt; J. J. ten Bosch

doi:10.1364/AO.32.004641

Applied Optics
Vol. 32,
Issue 24,
pp. 4641-4645
(1993)
•https://doi.org/10.1364/AO.32.004641

Method for measuring position-dependent volume reflection

R. A. Bolt and J. J. ten Bosch

Not Accessible

Your library or personal account may give you access

Get PDF
Email
Share
Get Citation
Copy Citation Text
R. A. Bolt and J. J. ten Bosch, "Method for measuring position-dependent volume reflection," Appl. Opt. 32, 4641-4645 (1993)

Export Citation
- BibTex
- Endnote (RIS)
- HTML
- Plain Text
Citation alert
Save article

Abstract

The position dependence of volume reflection caused by the illumination of a turbid material by a pencil beam of light yields information about the optical parameters of that material. Existing methods to measure the position dependence of the volume-reflection profile usually require scanning the sample surface and are hardly applicable to the area near the illuminating pencil beam. This paper describes an experimental set up based on a two-dimensional CCD camera with 14-bit dynamic range and a spatial resolution down to 20 μm. As a demonstration of its use, measurements are compared with theoretical results from the random-walk and diffusion theories. The conclusions are made that the equipment is suitable for measuring close to the illuminating beam without the need for scanning and that it gives an indication in terms of the product of radial distance toward the center of the beam and reduced scattering coefficient (rμ_s′) for the area where the theoretical results presented are valid.

Full Article | PDF Article

More Like This

Scaling relationships for theories of anisotropic random walks applied to tissue optics

A. H. Gandjbakhche, R. Nossal, and R. F. Bonner
Appl. Opt. 32(4) 504-516 (1993)

Spatially resolved absolute diffuse reflectance measurements for noninvasive determination of the optical scattering and absorption coefficients of biological tissue

Alwin Kienle, Lothar Lilge, Michael S. Patterson, Raimund Hibst, Rudolf Steiner, and Brian C. Wilson
Appl. Opt. 35(13) 2304-2314 (1996)

Condensed Monte Carlo simulations for the description of light transport

R. Graaff, M. H. Koelink, F. F. M. de Mul, W. G. Zijlstra, A. C. M. Dassel, and J. G. Aarnoudse
Appl. Opt. 32(4) 426-434 (1993)

Previous Article Next Article

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Sample	Description	μ_s (mm⁻¹)^a	g_theor^a	μ_a (mm⁻¹)^b	Albedo μ_s/μ_s + μ_a)
I10	intralipid 10.00 ml in 100 ml	11.3	0.75	0.049	0.996
I25	intralipid 10.00 ml in 250 ml	4.5	0.75	0.020	0.996
L08	Dow latex DL905 12.55 ml in 100 ml	11.3	0.139	0.25	0.979
L20	Dow latex DL905 12.55 ml in 250 ml	4.5	0.139	0.10	0.979
L28	Dow latex DL905 3.60 ml in 100 ml	3.24	0.139	0.071	0.979
L69	Dow latex DL905 3.60 ml in 250 ml	1.30	0.139	0.028	0.979

Sample	Offset^b				Slope (mm⁻¹)^c				μ_a from Eq. (3) (mm⁻¹)^d

	Eq.(1)	Eq.(3)	Approx. (5)	Exp.	Eq.(1)	Eq. (3)	Approx. (5)	Exp.
I10	0.0 (0.2)	0.0 (0.3)	0.0 (0.4)	0.0 (0.5)	0.62	0.65	0.33	0.12	1.8 × 10⁻³
I25	−0.6 (0.3)	0.0 (0.3)	0.0 (0.4)	−0.1 (0.5)	0.17	0.26	0.33	0.009	2.3 × 10⁻⁵
L08	0.3 (0.2)	0.2 (0.3)	0.2 (0.4)	0.1 (0.5)	2.7	2.7	0.39	0.445	6.8 × 10⁻³
L20	0.2 (0.2)	0.2 (0.3)	0.2 (0.4)	0.1 (0.5)	1.1	1.1	0.39	0.221	4.2 × 10⁻³

Sample	Offset^b		Slope^c

	Eq.(1)	Exp.	Eq.(1)	Exp.
I10	0.0 (0.2)	0.0 (0.6)	−1.7	−1.2
I25	−1.2(0.3)	−1.3 (0.5)	−0.89	−0.47
L08	2.06 (0.06)	2.0 (0.8)	−6.7	−4.8
L20	0.5 (0.1)	0.9 (0.7)	−2.5	−2.2
L28	0.0 (0.2)	0.4 (0.6)	−1.8	−1.5
L69	−1.2(0.3)	−0.4 (0.6)	−0.88	−1.0

Sample	Description	μ_s (mm⁻¹)^a	g_theor^a	μ_a (mm⁻¹)^b	Albedo μ_s/μ_s + μ_a)
I10	intralipid 10.00 ml in 100 ml	11.3	0.75	0.049	0.996
I25	intralipid 10.00 ml in 250 ml	4.5	0.75	0.020	0.996
L08	Dow latex DL905 12.55 ml in 100 ml	11.3	0.139	0.25	0.979
L20	Dow latex DL905 12.55 ml in 250 ml	4.5	0.139	0.10	0.979
L28	Dow latex DL905 3.60 ml in 100 ml	3.24	0.139	0.071	0.979
L69	Dow latex DL905 3.60 ml in 250 ml	1.30	0.139	0.028	0.979

Sample	Offset^b				Slope (mm⁻¹)^c				μ_a from Eq. (3) (mm⁻¹)^d

	Eq.(1)	Eq.(3)	Approx. (5)	Exp.	Eq.(1)	Eq. (3)	Approx. (5)	Exp.
I10	0.0 (0.2)	0.0 (0.3)	0.0 (0.4)	0.0 (0.5)	0.62	0.65	0.33	0.12	1.8 × 10⁻³
I25	−0.6 (0.3)	0.0 (0.3)	0.0 (0.4)	−0.1 (0.5)	0.17	0.26	0.33	0.009	2.3 × 10⁻⁵
L08	0.3 (0.2)	0.2 (0.3)	0.2 (0.4)	0.1 (0.5)	2.7	2.7	0.39	0.445	6.8 × 10⁻³
L20	0.2 (0.2)	0.2 (0.3)	0.2 (0.4)	0.1 (0.5)	1.1	1.1	0.39	0.221	4.2 × 10⁻³

Abstract

Cited By

Figures (4)

Tables (3)

Equations (9)

Applied Optics