Abstract: A first cover is in a closed state while being held by a second cover due to holding force exerted from a first holding mechanism. The second cover is in a closed state while being held by a housing due to holding force exerted from a second holding mechanism. The second cover is removable from the housing when force is applied against the holding force exerted from the second holding mechanism. The holding force is set such that, when the first cover is brought into an open state from the closed state, the holding of the first cover by the second cover is released with the second cover being held by the housing.

Abstract: In an infrared spectrophotometer, a plurality of rolling elements are provided between a movable portion and the holding portion. While no external force is applied from a spring, a play space is generated between the movable portion, the holding portion, and each rolling element. In the infrared spectrophotometer, when the movable mirror and the movable portion are slid, an external force directed downward is applied to the movable portion by the spring, thereby preventing each rolling element from moving between the movable portion and the holding portion. Accordingly, when the movable mirror and the movable portion are slid, it is possible to suppress rattling of the movable portion and the holding portion while leaving a fine gap between the movable portion, the holding portion, and each rolling element. This makes it possible to easily control the moving speeds of the movable mirror and the movable portion and to suppress rattling of the movable mirror and the movable portion.

Abstract: A housing has a partition wall constituting a wall surface of a sample chamber, and an interferometer chamber accommodating an optical component is formed on an opposite side to the sample chamber with respect to the partition wall. A window member is attachable to and detachable from an opening formed in the partition wall, and transmits light between the sample chamber and the interferometer chamber. The lid member is attachable to and detachable from the window member, and internally has a moisture absorbent accommodating space for accommodating a moisture absorbent. The lid member engages with the window member attached to the opening from a side of the sample chamber, so that the side of the sample chamber of the window member is covered with the lid member, and the moisture absorbent accommodating space is set in a substantially airtight state.

Abstract: A housing has a partition wall constituting a wall surface of a sample chamber, and an interferometer chamber accommodating an optical component is formed on an opposite side to the sample chamber with respect to the partition wall. A window member is attachable to and detachable from an opening formed in the partition wall, and transmits light between the sample chamber and the interferometer chamber. The lid member is attachable to and detachable from the window member, and internally has a moisture absorbent accommodating space for accommodating a moisture absorbent. The lid member engages with the window member attached to the opening from a side of the sample chamber, so that the side of the sample chamber of the window member is covered with the lid member, and the moisture absorbent accommodating space is set in a substantially airtight state.

Abstract: In an infrared spectrophotometer, a plurality of rolling elements are provided between a movable portion and the holding portion. While no external force is applied from a spring, a play space is generated between the movable portion, the holding portion, and each rolling element. In the infrared spectrophotometer, when the movable mirror and the movable portion are slid, an external force directed downward is applied to the movable portion by the spring, thereby preventing each rolling element from moving between the movable portion and the holding portion. Accordingly, when the movable mirror and the movable portion are slid, it is possible to suppress rattling of the movable portion and the holding portion while leaving a fine gap between the movable portion, the holding portion, and each rolling element. This makes it possible to easily control the moving speeds of the movable mirror and the movable portion and to suppress rattling of the movable mirror and the movable portion.

Abstract: A first cover is in a closed state while being held by a second cover due to holding force exerted from a first holding mechanism. The second cover is in a closed state while being held by a housing due to holding force exerted from a second holding mechanism. The second cover is removable from the housing when force is applied against the holding force exerted from the second holding mechanism. The holding force is set such that, when the first cover is brought into an open state from the closed state, the holding of the first cover by the second cover is released with the second cover being held by the housing.