71. Specification for personal eye-protectors used for adjustment work on lasers and laser systems. (15th January 1994) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
72. Specification for red and green filters used in ophthalmic dichromatic and dissociation tests. (9th October 1963) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
73. Specification for test methods for transparent materials for aircraft glazing. Determination of visible light transmission Part 5, (31st October 1989) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
74. Specification for visual densities of diazo and vesicular second-generation microforms. (28th August 1987) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
75. Tracked Changes. Eye and face protection for sports use. Requirements for eye protectors for squash and eye protectors for racquetball and squash 57 Part 2, (5th May 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (76 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
76. Tracked Changes. Eye and face protection. Sunglasses and related eyewear. Sunglasses for general use Part 1, (16th January 2023) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (100 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
77. Tracked Changes. Fibre optic interconnecting devices and passive components. Basic test and measurement procedures. Tests. High optical power Part 2-14, (28th July 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (46 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
78. Tracked Changes. Health and safety in welding and allied processes. Transparent welding curtains, strips and screens for arc welding processes. (26th May 2023) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (56 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
79. Tracked Changes. Ophthalmic optics. Uncut finished spectacle lenses. Transmittance specifications and test methods Part 3, (1st August 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (112 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
80. Tracked Changes. Optics and photonics. Measurement of reflectance of plane surfaces and transmittance of plane parallel elements. (21st June 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (66 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗