PIKE Technologies

PIKE Circular Infrared Windows

Precision-polished circular optical windows available in a wide variety of materials for all liquid and gas-phase FTIR applications

Product Overview

PIKE Circular Infrared Windows are the foundational components for transmission spectroscopy. We offer an extensive selection of materials, including KBr, ZnSe, CaF2, BaF2, and NaCl, to suit every chemical compatibility and spectral range requirement. Each window is polished to a high optical finish to ensure maximum transmission and minimal light scattering, providing the cleanest possible baseline for your measurements.Whether you are performing routine liquid analysis in a demountable cell or building a custom gas chamber, our windows provide the reliability and performance demanded by professional labs. We also offer specialized coatings and materials like Diamond and Polyethylene for extreme environments and Far-IR applications. Our windows are available in standard sizes to fit most commercial transmission accessories

Ordering Information

Part Number	Description
Disks, 13 mm Diameter	1 mm Thickness
160-5003	KBr, 13 x 1 mm
160-5004	NaCl, 13 x 1 mm
160-1149	BaF2, 13 x 1 mm
160-5001	CaF2, 13 x 1 mm
Disks, 13 mm Diameter	2 mm Thickness
160-1301	AMTIR, 13 x 2 mm
160-1218	BaF2, 13 x 2 mm
160-1213	CaF2, 13 x 2 mm
160-1198	CsI, 13 x 2 mm
160-1191	Ge, 13 x 2 mm
160-1135	KBr, 13 x 2 mm
160-1008	KBr, 13 x 2 mm (6-pack)
160-1173	KRS-5, 13 x 2 mm
160-1170	NaCl, 13 x 2 mm
160-1005	NaCl, 13 x 2 mm (6-pack)
160-5201	SiO2, 13 x 2 mm
160-5120	SiO2, low OH, 13 x 2 mm
160-1160	Si, 13 x 2 mm
160-1241	ZnS, 13 x 2 mm
160-1115	ZnSe, 13 x 2 mm
160-1001	ZnSe, 13 x 2 mm (6-pack)
Disks, 20 mm Diameter	2 mm Thickness
160-1148	BaF2, 20 x 2 mm
160-1144	CaF2, 20 x 2 mm
160-1197	CsI, 20 x 2 mm
160-1139	Ge, 20 x 2 mm
160-1134	KBr, 20 x 2 mm
160-1128	KRS-5, 20 x 2 mm
160-1169	NaCl, 20 x 2 mm
160-5211	Polyethylene, 20 x 2 mm
160-5119	SiO2, 20 x 2 mm
160-5121	SiO2, low OH, 20 x 2 mm
160-1118	Si, 20 x 2 mm
160-5118	ZnS, 20 x 2 mm
160-1304	ZnSe, 20 x 2 mm
Disks, 25 mm Diameter	2 mm Thickness
160-1201	AMTIR, 25 x 2 mm
160-1306	BaF2, 25 x 2 mm
160-1212	CaF2, 25 x 2 mm
160-1002	CaF2, 25 x 2 mm (6-pack)
160-1308	CsI, 25 x 2 mm
160-1307	Ge, 25 x 2 mm
160-1305	KBr, 25 x 2 mm
160-1172	KRS-5, 25 x 2 mm
160-1168	NaCl, 25 x 2 mm
160-1004	NaCl, 25 x 2 mm (6-pack)
160-5213	Polyethylene, 25 x 2 mm
160-5086	SiO2, 25 x 2 mm
160-5122	SiO2, low OH, 25 x 2 mm
160-1117	Si, 25 x 2 mm
160-5084	ZnS, 25 x 2 mm
160-1155	ZnSe, 25 x 2 mm
160-1007	ZnSe, 25 x 2 mm (6-pack)
Disks, 25 mm Diameter	4 mm Thickness
160-1217	BaF2, 25 x 4 mm
160-1211	CaF2, 25 x 4 mm
160-1196	CsI, 25 x 4 mm
160-1138	Ge, 25 x 4 mm
160-1133	KBr, 25 x 4 mm
160-1009	KBr, 25 x 4 mm (6-pack)
160-1127	KRS-5, 25 x 4 mm
160-1124	NaCl, 25 x 4 mm
160-1012	NaCl, 25 x 4 mm (6-pack)
160-5214	Polyethylene, 25 x 4 mm
160-5089	SiO2, 25 x 4 mm
160-5123	SiO2, low OH, 25 x 4 mm
160-1116	Si, 25 x 4 mm
160-5087	ZnS, 25 x 4 mm
160-1114	ZnSe, 25 x 4 mm
160-1109	ZnSe , double AR coated, 25 x 4 mm
160-1110	ZnSe, single AR coated, 25 x 4 mm
Disks, 25 mm Diameter	5 mm Thickness
160-1311	BaF2, 25 x 5 mm
160-1210	CaF2, 25 x 5 mm
160-1316	CsI, 25 x 5 mm
160-1313	Ge, 25 x 5 mm
160-1189	KBr, 25 x 5 mm
160-1003	KBr, 25 x 5 mm (6-pack)
160-1312	KRS-5, 25 x 5 mm
160-1123	NaCl, 25 x 5 mm
160-1011	NaCl, 25 x 5 mm (6-pack)
160-5100	SiO2, 25 x 5 mm
160-5124	SiO2, low OH, 25 x 5 mm
160-5090	ZnS, 25 x 5 mm
160-1154	ZnSe, 25 x 5 mm
Disks, 32 mm Diameter	3 mm Thickness
160-1200	AMTIR, 32 x 3 mm
160-1199	AMTIR, drilled, 32 x 3 mm
160-1147	BaF2, 32 x 3 mm
160-1017	BaF2, 32 x 3 mm (6-pack)
160-1146	BaF2, drilled, 32 x 3 mm
160-1018	BaF2, drilled, 32 x 3 mm (6-pack)
160-1143	CaF2, 32 x 3 mm
160-1142	CaF2, drilled, 32 x 3 mm
160-1195	CsI, 32 x 3 mm
160-1194	CsI, drilled, 32 x 3 mm
160-1137	Ge, 32 x 3 mm
160-1136	Ge, drilled, 32 x 3 mm
160-1132	KBr, 32 x 3 mm
160-1010	KBr, 32 x 3 mm (6-pack)
160-1131	KBr, drilled, 32 x 3 mm
160-1015	KBr, drilled, 32 x 3 mm (6-pack)
160-1126	KRS-5, 32 x 3 mm
160-1125	KRS-5, drilled, 32 x 3 mm
160-1122	NaCl, 32 x 3 mm
160-1013	NaCl, 32 x 3 mm (6-pack)
160-1121	NaCl, drilled, 32 x 3 mm
160-1014	NaCl, drilled, 32 x 3 mm (6-pack)
160-5216	Polyethylene, 32 x 3 mm
160-5215	Polyethylene, drilled, 32 x 3 mm
160-5049	SiO2, 32 x 3 mm
160-5125	SiO2, low OH, 32 x 3 mm
160-5052	SiO2, drilled, 32 x 3 mm
160-5126	SiO2, drilled, low OH, 32 x 3 mm
160-1159	Si, 32 x 3 mm
160-1158	Si, drilled, 32 x 3 mm
160-5047	ZnS, 32 x 3 mm
160-5048	ZnS, drilled, 32 x 3 mm
160-1113	ZnSe, 32 x 3 mm
160-1112	ZnSe, drilled, 32 x 3 mm
Disks, 37.5 mm Diameter	4 mm Thickness
160-1281	BaF2, 37.5 x 4 mm
160-1286	ZnSe, 1-side AR coated, 37.5 x 4 mm
160-1287	CaF2, 37.5 x 4 mm
160-1288	KBr, 37.5 x 4 mm
160-1289	KCl, 37.5 x 4 mm
160-1290	NaCl, 37.5 x 4 mm
160-1291	ZnSe, 37.5 x 4 mm
Disks, 38 mm Diameter	3 mm Thickness
160-1349	BaF2, 38 x 3 mm
160-1350	Ge, 38 x 3 mm
160-5220	KBr, 38 x 3 mm
160-1344	KRS-5, 38 x 3 mm
160-5218	Polyethylene, 38 x 3 mm
160-1233	SiO2, 38 x 3 mm
160-5127	SiO2, low OH, 38 x 3 mm
160-1353	Si, 38 x 3 mm
160-1315	ZnS, 38 x 3 mm
160-5025	ZnSe, 38 x 3 mm
Disks, 38 mm Diameter	6 mm Thickness
160-1357	AMTIR, 38 x 6 mm
160-1322	BaF2, 38 x 6 mm
160-1342	CaF2, 38 x 6 mm
160-1326	CsI, 38 x 6 mm
160-1323	Ge, 38 x 6 mm
160-1320	KBr, 38 x 6 mm
160-1343	KRS-5, 38 x 6 mm
160-1321	NaCl, 38 x 6 mm
160-5219	Polyethylene, 38 x 6 mm
160-1355	SiO2, 38 x 6 mm
160-5128	SiO2, low OH, 38 x 6 mm
160-1324	Si, 38 x 6 mm
160-1329	ZnSe, 38 x 6 mm
Disks, 41 mm Diameter	3 mm Thickness
160-1216	BaF2, 41 x 3 mm
160-1209	CaF2, 41 x 3 mm
160-1188	KBr, 41 x 3 mm
160-1167	NaCl, 41 x 3 mm
160-5217	Polyethylene, 41 x 3 mm
160-5157	ZnS, 41 x 3 mm
160-1341	ZnSe, 41 x 3 mm
Disks, 49 mm Diameter	3 mm Thickness
160-5161	ZnS, 49 x 3 mm
160-1153	ZnSe, 49 x 3 mm
Disks, 49 mm Diameter	6 mm Thickness
160-5027	BaF2, 49 x 6 mm
160-5206	CaF2, 49 x 6 mm
160-5029	CsI, 49 x 6 mm
160-1187	KBr, 49 x 6 mm
160-5205	KRS-5, 49 x 6 mm
160-1166	NaCl, 49 x 6 mm
160-5164	SiO2, 49 x 6 mm
160-5129	SiO2, low OH, 49 x 6 mm
Disks, 50 mm Diameter	3 mm Thickness
160-5030	BaF2, 50 x 3 mm
160-1208	CaF2, 50 x 3 mm
160-5173	CsI, 50 x 3 mm
160-1186	KBr, 50 x 3 mm
160-1171	KRS-5, 50 x 3 mm
160-1165	NaCl, 50 x 3 mm
160-5177	ZnS, 50 x 3 mm
160-1152	ZnSe, 50 x 3 mm

Key Features

Broad Material Selection: Options for Mid-IR, Far-IR, Near-IR, and UV-Vis.
High Optical Quality: Precision polished for superior spectral clarity.
Chemical Compatibility: Materials available for acidic, basic, and organic samples.
Standard & Custom Sizes: Fits all PIKE accessories and most third-party cells.
Durable Performance: Consistent thickness and flatness for repeatable results

Specifications

Spectral Range

(cm⁻¹)Chemical PropertiesKBr40,000 – 400Hygroscopic, standard Mid-IRZnSe20,000 – 500Water resistant, hard, high RICaF250,000 – 900Acid/Base resistant, Mid-IRNaCl40,000 – 600Economical, hygroscopicPolyethylene600 – 10Ideal for Far-IR

Ready to learn more about PIKE Circular Infrared Windows?

Our team is ready to help you find the perfect solution for your spectroscopy needs.