Reflectivity of Metals versus Wavelength

The question often arises, "What coating is best for my optics?" The choice of coating is influenced by price, durability and reflectance at a specific wavelength. Call us to talk about price and durability. Use the below chart to see which metal coating should be best at your wavelength.

MICRONS	ALUMINUM	SILVER	GOLD	COPPER	RHODIUM	PLATINUM

0.22	91.5	28	27.5	40.4	57.8	40.5
0.24	91.9	29.5	31.6	39	63.2	46.9
0.26	92.2	29.2	35.6	35.5	67.7	51.5
0.26	92.3	25.2	37.8	33	70.7	54.9
0.3	92.3	17.6	37.7	33.6	73.4	57.6
0.315	92.4	5.5	37.3	35.5	75	59.4
0.32	92.4	8.9	37.1	36.3	75.5	60
0.34	92.5	72.9	36.1	38.5	76.9	62
0.36	92.5	88.2	36.3	41.5	78	63.4
0.38	92.5	92.8	37.8	44.5	78.1	64.9
0.4	92.4	94.8	38.7	47.5	77.4	66.3
0.45	92.2	96.6	38.7	55.2	76	69.1
0.5	91.8	97.7	47.7	60	76.6	71.4
0.55	91.5	97.9	81.7	66.9	78.2	73.4
0.6	91.1	98.1	91.9	93.3	79.7	75.2
0.65	90.3	98.3	95.5	96.6	81.1	76.4
0.7	89.9	98.5	97	97.5	82	77.2
0.75	88	98.6	97.4	97.9	82.6	77.9
0.8	86.3	98.6	97.7	98.1	83.1	78.5
0.85	86	98.7	97.8	98.3	83.4	79.5
0.9	89	98.7	98	98.4	83.6	80.5
0.95	91.8	98.8	98.1	98.4	83.9	80.6
1	94	98.9	98.2	98.5	84.2	80.7
1.5	96.8	98.9	98.2	98.5	87.7	81.8
2	97.2	98.9	98.3	98.6	91.4	81.8
3	98	98.9	98.4	98.6	95	90.6
4	98.2	98.9	98.5	98.7	95.8	93.7
5	98.4	98.9	98.6	98.7	96.4	94.9
6	98.5	98.9	98.6	98.7	96.8	95.6
7	98.6	98.9	98.7	98.7	97	95.9
8	98.7	98.9	98.8	98.8	97.2	96
9	98.7	98.9	98.9	98.8	97.4	96.1
10	98.7	98.9	98.9	98.9	97.6	96.2
15	98.9	99	99	99	98.1	96.7
20	99	99.2	99	99.2	98.3	97
30	99.2	-	99	-	-	-
40	-		99.1

Space Optics Research Labs

7 Stuart Road, Chelmsford, MA 01824

Telephone (978) 250-8640 Fax (978) 256-5605 E-mail to SORL

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